Data sampling studies. Medical search. Frequent questions

Spurred in part by the ever-growing number of sensors and web-based methods of collecting data, the use of Intensive Longitudinal Data (ILD) is becoming more common in the social and behavioural sciences. (arxiv.org)
However, this approach was limited by low sample acquisition rates with opportunistic faecal (scat) collection methods. (researchgate.net)
Three years of sample collection using both detection dogs and opportunistic methods are summarised. (researchgate.net)
Faecal sample collection rates using detection dogs were over four times higher than opportunistic methods. (researchgate.net)
This new edition of Survey Sampling: Theory and Methods has been updated to include the latest research and the newest methods. (routledge.com)
Covering the current state of development of essential aspects of theory and methods of survey sampling, the authors have taken great care to avoid being dogmatic and eschew taking sides in their presentation. (routledge.com)
Data sharing generally takes place via either of two methods. (bmj.com)
When we started, we were aware of the strong requirements for long-read sequencing, requesting long DNA fragments and high DNA purity, and expected low performance for quantitative metagenomic analysis compared to conventional short-read methods in such complex mock samples," Almeida said. (genomeweb.com)
This is a nice comparison of the long- and short-read platforms, and shows overall comparability between methods," said Chris Mason, a sequencing expert at Weill Cornell Medicine who was not involved in the study. (genomeweb.com)
Assessment of early life history characteristics requires effective sampling methods for larval fishes. (bioone.org)
In this study, two passive sampling methods were compared for use in collecting larval freshwater and estuarine fishes in two tropical streams. (bioone.org)
Catches were compared between sampling methods. (bioone.org)
Methods: A simulation study was conducted investigating the effect of the number of cases, strength of exposure-response relation and skewness of exposure variable on bias and relative efficiency. (cdc.gov)
With the help of surface geophysical methods, the location of the coarse-grained layers can be known faster and more economically, which could be relevant for studying the potential for quick-clay landslide occurrence over large areas. (lu.se)

In this paper, we present the results of toxicological analyses of preserved brain tissue and bone samples from the remains of the seventeenth century patients of the Ospedale Maggiore , the main hospital in Milan and one of the most innovative hospitals in Europe from the Renaissance period. (nature.com)
In this multidisciplinary study of the remains, toxicological analyses in particular were performed with HPLC-MS/MS on different biological samples from nine individuals. (nature.com)
Water samples for the analyses contained in this release were collected from July 2015 through December 2018. (usgs.gov)
In North Atlantic right whales (Eubalaena glacialis), a significant decline in reproduction and health in the 1990s led to the application of faecal-based analyses to study stress and reproductive endocrinology, marine biotoxin exposure and prevalence of disease-causing protozoa. (researchgate.net)
The use of detection dogs for scat collection from free-swimming right whales has for the first time provided adequate numbers of samples for statistical analyses. (researchgate.net)
Processed rock powders produced from various bedrock samples (e.g. drill cores, rock piece and block samples) for the purpose of chemical analyses. (gtk.fi)
XY is the guarantor of this work and, as such, had full access to all the data in the study and take responsibility for the integrity and accuracy of the data and data analyses. (bmj.com)
Using the largest genome-wide association study of gut microbiota genera from the MiBioGen consortium, we used polygenic risk score (PRS) analyses with the "best-fit" model implemented in PRSice-2 and determined the genetic correlation between 119 genera and AD in a discovery sample (ADc12 case/control: 1278/1293). (nature.com)
The study demonstrated the readiness of the DEPArray for incorporation into casework analyses in forensic laboratories. (ojp.gov)
This applies to both the sample preparation and data analyses. (ojp.gov)

Filtering the presence data appeared to adequately remove an eastward, large-river sampling bias that was evident within the unfiltered presence dataset. (datadryad.org)
Summary of dataset content: Peat samples from researched mires taken for laboratory analysis. (gtk.fi)
The ORNL Naturalistic Driving Study Sample (ONDSS) is a dataset created by Oak Ridge National Laboratory to help evaluate algorithms used in an analysis of automobile driver behavior. (ornl.gov)
Glycohemoglobin measures were collected in a full sample and are available in a separate dataset, GLU_F. (cdc.gov)

Respondents' most common concerns about data sharing were related to appropriate data use, investigator or funder interests, and protection of research subjects. (bmj.com)
The new GfK study compared 21 sample sources from three major industry providers, assessing everything from double-opt-in panels and communities to "river" samples that recruit respondents directly from web traffic. (gfk.com)
We used data from the MIDUS study, a national probability sample of non-institutionalized, English speaking respondents aged 25-74 living in the 48 contiguous states of the United States. (springer.com)
This particular study consists of 63 percent sampled and 37 percent volunteer respondents. (thearda.com)

Wastewater was intermittently sampled from the MIP-5H separator on the well pad from December 10, 2015, to December 6, 2018. (usgs.gov)
A storage tank at the well pad site was sampled on December 6, 2018. (usgs.gov)
The study, published in the journal Scientific Data , ran the samples between 2018 and 2019 on many of the most-used sequencers available at the time, including Illumina's HiSeq 3000, MGI Tech's DNBsEQ-G400 and T7, Thermo Fisher Scientific's Ion Torrent GeneStudio S5 and Ion Proton P1, Oxford Nanopore Technologies' MinIon, and Pacific Biosciences' Sequel II. (genomeweb.com)
The labs began collecting data around 2018 and finished shortly before 2020. (genomeweb.com)
Recently I have been running a project collecting data on how the 2018 drought hit Swedish farmers, to be able to analyse how vulnerability to an extreme event is shaped in a "northern" context. (lu.se)

South West Water use Tinytag data loggers across their wastewater sampling operation to ensure compliance with Environment Agency regulations. (geminidataloggers.com)
Wastewater sampling is a process which must be carried out by all UK Water Companies in order to monitor the performance of wastewater treatment plants. (geminidataloggers.com)
Each sample that is collected has to be transported to South West Water's laboratory in Exeter, where the wastewater is tested to determine that it has been treated properly at one of the company's treatment centres. (geminidataloggers.com)
A supply of over 100 Tinytag data loggers powers South West Water's wastewater sample monitoring programme. (geminidataloggers.com)
The temperature of the wastewater samples is measured from the point of collection until the time they are transferred to refrigeration units or vehicles. (geminidataloggers.com)
This project was designed to collect comprehensive data from multiple sample types, including Monongahela River water, wastewater collected at the separator (during the flowback and produced-water phase), storage tank wastewater, and field blanks. (usgs.gov)

We discuss how the characteristics of the data influence parameter estimation and provide recommendations to researchers seeking to apply the mHMM to their own data. (arxiv.org)
Re-sampling and variance estimation in complex surveys. (routledge.com)
Sample size estimation in diagnostic tests may take two forms. (bmj.com)
When determining the sample size for full-scale trials, using the CI bounds from the pilot trials instead of the point estimate may improve power estimation. (bmj.com)

Environmental sampling data indicate contaminant levels in various environmental media. (cdc.gov)

The paper questionnaire was mailed on Feb 12, 2016 to 4,451 individuals who were sampled to become panelists. (thearda.com)
The web survey was distributed on Jan 29, 2016 via email invitation to 1,608 panel volunteers and sampled panelists who have requested web-based surveys. (thearda.com)

The findings were complemented by a study using the National Inpatient Sample (NIS) database to explore CVE risk in pregnant individuals with various rheumatic diseases. (medscape.com)
Replication study is a commonly used approach to verifying positive findings [ 3 , 4 ]. (springer.com)
If the replication study is underpowered, then the positive findings will have a low chance to be replicated. (springer.com)
After considering these international findings, we decided to investigate the age at menarche, pubarche and telarche in a representative sample of Mexican girls and to analyze these data in conjunction with anthropometrical variables, age at menarche of mothers and sisters, regular exercise, emotional stress, and other factors to ascertain if any of them are predictors of the age of the onset of puberty. (scirp.org)
This is the Final Technical Report on the findings and methodology of a study that examined whether and how an automated dielectrophoretic-based single cell separation technique (DEPArray) can improve forensic laboratory efficiency, mixture deconvolution, and combat sample inhibition. (ojp.gov)
Microscopic cervicitis (≥10 polymorphonuclear leukocytes/epithelial cell) and normal (predominantly lactobacillary) microbiota were the most frequent findings in the samples in which the pathogens were detected alone or in multiple infections, except for samples with Trichomonas vaginalis in which the coccobacillary microbiota was the most common. (hindawi.com)
States can use findings from this study to tailor efforts to decrease SSB intake and to encourage consumption of more healthful beverages (eg, water) among their high-risk populations. (cdc.gov)

Data -- Spatial sampling bias and model complexity in stream-based species distribution models: a case study of Paddlefish (Polyodon spathula) in the Arkansas River basin, U.S.A. (datadryad.org)
Maxent is one of the most popular modeling algorithms, yet recent research has demonstrated Maxent models are vulnerable to prediction errors related to spatial sampling bias and model complexity. (datadryad.org)
Herein, we use Maxent and customized R code to estimate the potential distribution of paddlefish ( Polyodon spathula ) at a stream segment-level within the Arkansas River basin, U.S.A, while accounting for potential spatial sampling bias and model complexity. (datadryad.org)
Overall, our results solidified the importance of accounting for model complexity and spatial sampling bias in SDMs constructed within stream networks and provided a roadmap for future paddlefish restoration efforts in the study area. (datadryad.org)
A simulation study of relative efficiency and bias in the nested case-control study design. (cdc.gov)
This study expanded upon these results through a simulation study by also considering a continuous exposure variable as well as investigating potential bias due to small sample sizes. (cdc.gov)
Conclusions: Gains in relative efficiency and bias reduction can be realized by sampling more than the 5-10 controls per case generally recommended, especially when there are few cases, a strong exposure-response relation and a skewed exposure variable. (cdc.gov)
However, we also acknowledge the possible data bias that could result from missing AMR information in articles published in languages other than French or English. (who.int)

The work presented here evaluates the relative sampling efficiency of scent detection dogs trained to locate North Atlantic right whale scat versus opportunistic scat collection during photoidentification surveys. (researchgate.net)

DNA samples were collected in the National Health and Nutrition Examination Survey (NHANES) III (1988-1994) and in subsequent NHANES cycles (1999-2002, 2007-2008, 2009-2010, and 2011-2012). (cdc.gov)
The program is a nationally representative collection of stored DNA samples and genetic data and will serve to add to the extensive amount of health, nutritional, and environmental information collected from NHANES. (cdc.gov)
For NHANES III Phase II (1991-1994), DNA concentrations per sample vary and are estimated to range from 7.5-65 nanograms of DNA per microliter with an average of approximately four micrograms of DNA in 100 µl. (cdc.gov)
Resulting genetic variants are deposited into the NHANES Genetic Data Repository after NCHS Quality Control Review. (cdc.gov)
For information about NHANES genetic datasets and weights review the Genetic Data Repository Information Sheet [PDF - 35 KB] and Weights Documentation [PDF - 35 KB] . (cdc.gov)
A limited number of associated variants have been anonymized so the data can no longer be linked to the public use files and therefore not linkable to other NHANES data. (cdc.gov)
What kind of studies can I do with the NHANES DNA samples? (cdc.gov)
NHANES is a nationally representative study and DNA samples are best utilized to determine associations with diseases or conditions using the survey sample weights. (cdc.gov)
The analysis of NHANES laboratory data must be conducted with the key survey design and basic demographic variables. (cdc.gov)

Analytic studies of survey data. (routledge.com)
We used an analytic sample from MIDUS-II (1996/1997) and MIDUS-III (2013) ( n = 1821). (springer.com)

In this work, the potential use of isotopic analysis of Cu in serum samples as an alternative diagnostic parameter for Wilson's disease has been investigated. (rsc.org)
WD patients, patients who had undergone bariatric surgery, infants) or normal (supposedly healthy adults) Cu concentration levels was determined by means of multi-collector ICP-mass spectrometry ( MC-ICP-MS ), after chromatographic isolation of Cu. For this purpose, AG-MP-1 strong anion exchange resin was relied upon, enabling quantitative recovery of Cu in pure form from the serum samples. (rsc.org)
The use of this optimized method provided δ 65 Cu for the serum samples with a typical analytical uncertainty of ±0.20‰ ( k = 2). (rsc.org)
In matched saliva and serum samples, all saliva samples presented lower IgG levels than serum samples, and only one saliva sample presented a higher IgM level. (frontiersin.org)

The measurement and analytical data for sampling based on the original requirements has been stored in the GTK data warehouses. (gtk.fi)

ERN_16-178) during May 18-June 3, of such sampling in large-scale seroepidemiologic 2020. (cdc.gov)

Only variants that pass NCHS Quality Control Review are added to the Genetic Data Repository. (cdc.gov)

FSIS is conducting an in-field surface sampling study to determine the feasibility of a non-destructive surface sample collection method to collect raw beef manufacturing trimmings verification samples. (usda.gov)

EI results are site-specific and applicable only to the sampling locations or investigation participants (i.e., they cannot be generalized to other areas, individuals, or populations). (cdc.gov)
Providers viewed study results skeptically, particularly that 95% of abnormal LDCT results were false positives, the need to screen 320 patients to prevent 1 lung cancer death, and the small proportion of minority participants. (cdc.gov)
Participants are providing genetic data, biological samples, and other information about their health. (medlineplus.gov)
To encourage open data sharing, participants can access their health information, as well as research that uses their data, during the study. (medlineplus.gov)

Could you have misconceptions about data visualization and statistical analysis that may affect the outcomes of your research? (mayo.edu)
Using data from the Study of Outcomes in Mothers and Infants (SOMI) database, an administrative population-based birth cohort in California, they identified more than 7 million individuals, 19,340 with ARDs and 7758 with APS. (medscape.com)
In addition, full access to trial data reduces the potential for incomplete reporting of study outcomes and improves the medical evidence base, which should ultimately improve clinical decision making. (bmj.com)
All the authors have approved the review procedure, data analysis, reporting and submission of the analysis outcomes. (who.int)

FSIS currently collects raw beef manufacturing trimmings verification samples using the N60 excision sampling procedure as described in FSIS Directive 10,010.1 , Sampling Verification Activities for Shiga Toxin-Producing Escherichia coli (STEC) in Raw Beef Products . (usda.gov)
The data collection procedure involved visiting these areas and approaching households to request their voluntary participation in the study. (statisticsassignmenthelp.com)

The Gene-SOEP sample is a longitudinal study that includes 107 full-sibling pairs, 501 parent-offspring pairs, and 152 parent-offspring trios that are overlapping with the parent-offspring pairs. (diw.de)

They are higher than sample sizes estimated by plugging observed effect sizes in power calculation. (springer.com)
Thus, the same power calculation in the original primary study is used. (springer.com)
One may think to plug the observed effect sizes from the primary study in the power calculation of the replication study. (springer.com)
We present nomograms for the prospective calculation of sample size in studies evaluating single diagnostic tests. (bmj.com)
For the carbon stock calculation, a sample size of 155 plots of 0.1 hectare (Ha) was taken using preliminary survey at 95% confidence interval and 10% allowable error. (scielo.br)

0.001), similar to the level found in a representative sample of 390 Norwegian doctors. (bmj.com)
Objective: To investigate the age at menarche, pubarche and telarche in a representative sample of residents of an urban zone of Leon, Guanajuato, Central Mexico and to evaluate the secular change of the age at menarche between 1985 and 2000. (scirp.org)
Several studies have examined sociodemographic characteristics associated with SSB intake among a nationally representative sample of US adults (3,16-19). (cdc.gov)
ABSTRACT: Using a representative sample of public facilities surveyed in 1993 and 1997, we took advantage of exogenous changes imposed on the Indonesian health system to evaluate the contribution of physicians, nurses, and midwives to the quality of primary care. (who.int)

using a target variance for an estimate to be derived from the sample eventually obtained, i.e., if a high precision is required (narrow confidence interval) this translates to a low target variance of the estimator. (wikipedia.org)
In practice, since p is unknown, the maximum variance is often used for sample size assessments. (wikipedia.org)
Additionally, catches under different environmental conditions (flow, tide stage, and moon phase), during different sampling periods (time of day and week of summer), and at different depths were compared using mixed-effects analysis of variance. (bioone.org)

A list of publications resulting from collected DNA samples and/or genetic data repository. (cdc.gov)
What are the proposal guidelines for accessing the Genetic Data Repository? (cdc.gov)
We collected genetic data from 2,598 individuals in the SOEP Innovation Sample, yielding the first genotyped sample that is representative of the entire German population (Gene-SOEP). (diw.de)

Part of the material (final reports, ready-made map and spatial data products, etc.) can be downloaded from the Hakku service mainly free of charge. (gtk.fi)

The goal of the study is to determine if a non-destructive surface sampling device, the cloth manual sampling swab - commonly referred to as the "cloth" - can replace the current N60 excision sample collection method used to take a sample under the MT60 sampling project. (usda.gov)
The N60 excision method (MT60 project code) is a destructive sampling method that requires IPP to cut and collect thin slices from the external surface of beef tissues. (usda.gov)
The alternative sampling method should cover the surface area of a standard combo bin. (usda.gov)
The goal is to compare the N60 excision sampling and the non-destructive cloth surface sample collection method to determine if the cloth can comparably recover organisms (fit-for-purpose). (usda.gov)
IPP will receive PHIS tasks for the non-destructive cloth sampling method under the MT60_CLOTH sampling code. (usda.gov)
Dried blood spot (DBS) samples can be used for the established method for detecting antibodies against detection of severe acute respiratory syndrome corona- virus 2 spike antibodies. (cdc.gov)
Replication study is a commonly used verification method to filter out false positives in genome-wide association studies (GWAS). (springer.com)
An Empirical Bayes (EB) based method is proposed to estimate the power of replication study for each association. (springer.com)
Sample sizes are estimated on 6 diseases from Wellcome Trust Case Control Consortium (WTCCC) using our method. (springer.com)
Our new method can objectively determine replication study's sample size by using information extracted from primary study. (springer.com)
In a previous paper, 1 we described a method of calculating sample size in diagnostic tests by determining the precision of the expected sensitivity and specificity. (bmj.com)
It is an endpoint enzymatic method with a sample blank correction. (cdc.gov)
A sample of PhD studies using qualitative approaches, and qualitative interviews as the method of data collection was taken from theses.com and contents analysed for their sample sizes. (qualitative-research.net)
This method ensured that each resident had an equal opportunity to be included in the study. (statisticsassignmenthelp.com)
0.05) explanatory variables for total larval catch were stream, sampling method, week of summer, time of day, and moon phase. (bioone.org)

The girls should provide a signed consent form by their parents or legal guardians who authorized the participation of their daughters in the study. (scirp.org)
Secretariat, which may include participation in future WHO-international missions to study the origins of SARS-CoV-2 or for other emerging pathogens. (who.int)

This is a quantitative study supported with qualitative responses. (thearda.com)

FSIS is focusing its surface sampling (cloth) analysis on Salmonella and indicators during the in-field study. (usda.gov)
Although further studies with a larger number of samples are needed, results are encouraging as far as the use of Cu isotopic analysis for early diagnosis of Wilson's disease is concerned. (rsc.org)
Misconceptions and problems with data visualization and statistical analysis are common in published studies. (mayo.edu)
In this course, learners identify and correct misconceptions about data visualization and statistical analysis that are common in the basic biomedical sciences and other disciplines using small sample size studies. (mayo.edu)
Capillary batch injection analysis: A novel approach for studying nanolitre samples. (uni-regensburg.de)
Data were analyzed with a content analysis approach. (annfammed.org)
Contributors XY and SE conceptualised and designed the study and lead the acquisition, analysis and interpretation of the data. (bmj.com)
KR significantly contributed to the data analysis and interpretation. (bmj.com)
This Data Analysis assignment presents a comprehensive study in which we delve into the intriguing relationship between weight and height among the diverse residents of Providence Island. (statisticsassignmenthelp.com)
With meticulous data collection, analysis, and visualization, we unveil a compelling positive correlation between weight and height, shedding light on how these two variables intersect in the context of health and well-being. (statisticsassignmenthelp.com)
To confirm the results from the discovery sample, we next repeated the PRS analysis in a replication sample (GenADA case/control: 799/778) and then performed a meta-analysis with the PRS results from both samples. (nature.com)
Meta-analysis with discovery and replication samples confirmed that ten genera had a significant correlation with AD, four of which were significantly associated with the APOE rs429358 risk allele in a direction consistent with their protective/risk designation in AD association. (nature.com)
batch effects and outlier samples can easily be missed in the early stages of analysis. (nih.gov)
It is consensus in the metabolomics community that standardized protocols should be followed for sample handling, storage and analysis, as it is of utmost importance to maintain constant measurement conditions to identify subtle biological differences. (mdpi.com)
Data analysis was conducted using SPSS, and was initially characterised using descriptive statistics, correlations and generalised estimating equations to observe changes in brand varieties over time. (bmj.com)

Complete datasets also allow South West Water to identify any breaches of the specified sample temperature limits and duly notify the Environment Agency that any sample effected would be 'non-compliance' and a re-schedule would be forthcoming as per regulations. (geminidataloggers.com)
Proposals to analyze genetic datasets may be submitted to the Research Data Center (RDC). (cdc.gov)
As a microbiome data analyst, I wanted to put forward these complex synthetic communities' datasets," she said, noting that this particular journal fit the bill for providing open access to them. (genomeweb.com)
The datasets generated during the current study are available from the corresponding author on reasonable request. (bmj.com)
Larger datasets and functional studies are required to understand their causal relationships. (nature.com)

We frame this simulation study in the context of sleep research, which consists of multivariate continuous data that displays considerable overlap in the state dependent component distributions. (arxiv.org)
The Problem With Using Bar Graphs for Continuous Data. (mayo.edu)
and continuous data review to identify systematic error. (cdc.gov)

The Presbyterian Panel consists of two nationally representative samples of groups affiliated with the Presbyterian Church (U.S.A.): members of congregations and teaching elders (ministers of the Word and Sacrament). (thearda.com)

It has become common practice to sample 5 - 10 controls per case, however, previous research has shown that in certain instances, significant gains in relative efficiency can be realized when more controls are matched with each case. (cdc.gov)

STEC testing of the MT60 sample requires establishments to hold product until test results are available. (usda.gov)
Our results show that, for the population considered in this study, combination of Cu concentration values and Cu isotopic information allows classification of WD patients, infants and controls into different groups, while the use of concentration values only is not sufficient for this purpose. (rsc.org)
Although the study grouped rheumatic diseases together, "lupus is generally driving these results," Sharon Kolasinski, MD, of the University of Pennsylvania in Philadelphia noted in an interview with Medscape Medical News . (medscape.com)
19 These results emphasise the need for further long term follow-up studies to determine which factors contribute to positive changes. (bmj.com)
The authors submitted their results to Scientific Data to make them more easily accessible to the field, he added. (genomeweb.com)
We report results of a qualitative study of patient experiences with video visits with their established primary care clinicians and their preferences for future use of video visits. (annfammed.org)
The 21 individual sample sources also turned out to be largely comparable on quality, with some river samples posting surprisingly high scores and some panels and communities delivering lesser results. (gfk.com)
We demonstrated a clear secular tendency towards an earlier onset of menarche by comparing our results (11.9 ± 0.04) with data from 1985 (12.8 ± 1.3) for adolescents from the same city. (scirp.org)
We constructed a repository of 66 polygenic indices in the Gene-SOEP sample based on results from well-powered genome-wide association studies. (diw.de)

The data loggers' thermistor probe is placed at the bottom of the collection vessel, monitoring sample temperature as the autosampler collects a composite sample over the 24 hours sample period, spot-checks of product temperature are also carried out regularly. (geminidataloggers.com)
For some sites, other sources of sampling data are those that ATSDR collects during an exposure investigation (EI) pdf icon [PDF - 1,034 KB] . (cdc.gov)

US population data show marked racial/ethnic and socioeconomic disparities in lung cancer mortality, prevalence of smoking, stage at diagnosis, and adherence to cancer screening (8,9). (cdc.gov)
Researchers can use these data to study a large range of diseases, with the goals of better predicting disease risk, understanding how diseases occur, and finding improved diagnosis and treatment strategies. (medlineplus.gov)

sampling of blood or tissues. (researchgate.net)

The study employed an observational approach, meaning that data concerning weight and height was collected without any form of intervention or manipulation. (statisticsassignmenthelp.com)

A straightforward random sampling approach was utilized to gather a sample of residents from Providence Island. (statisticsassignmenthelp.com)

Nicotine concentrations were also found in a number of key, sen- worldwide.1,2 While many tinel buildings, including 95% (155/163) of hospital samples (in the physicians' and municipalities and countries are con- nurses' stations the median was 0.27 [IQR, 0.02-1.94] µg/m3), schools, government trolling exposures of the population to buildings, and/or airports in most countries. (who.int)

Multiple pathogens were observed in 12.8% of samples. (hindawi.com)

The U. S. Geological Survey (USGS) has been studying the organic compounds in water produced from shale gas wells and in 2014, NNE started drilling two production wells in the Marcellus Shale. (usgs.gov)
The Geological Survey of Finland GTK produces impartial and objective research data and services in support of decision-making in industry, academia, and wider society to accelerate the transition to a sustainable, carbon-neutral world. (gtk.fi)

To design a replication study, traditional approaches calculate power by treating replication study as another independent primary study. (springer.com)
These approaches do not use the information given by primary study. (springer.com)

All establishments that typically receive MT60 sampling assignments have been included in the study. (usda.gov)
ATSDR typically relies on other agencies' sampling data that are collected for many reasons, so the data ATSDR uses are not always specifically collected for the PHA process. (cdc.gov)

An important component of the PHA process is evaluating the usability and quality of environmental and biological sampling data. (cdc.gov)
ATSDR EIs can include environmental sampling and/or biological sampling. (cdc.gov)

5 volunteers provided duplicate blood spot (DBS) sampling is simple, inexpensive, and 1 volunteer provided triplicate matched samples and can be self-collected and then sent by postal (Appendix Figure, https://wwwnc.cdc.gov/EID/ article/26/12/20-3309-App1.pdf). (cdc.gov)
A total of 6,059 panelists (sampled and volunteer) were invited to participate in this survey. (thearda.com)

If data gaps are identified, how should they be filled? (cdc.gov)

Design Cohort study followed by self reported assessment at one year. (bmj.com)
Purpose: The nested case-control study design, in which a fixed number of controls are matched to each case, is often used to analyze exposure-response associations within a cohort. (cdc.gov)
To this end, the NIH has launched a study, known as the All of Us Research Program, which involves a group (cohort) of at least 1 million volunteers from around the United States. (medlineplus.gov)

For example, if we wish to know the proportion of a certain species of fish that is infected with a pathogen, we would generally have a more precise estimate of this proportion if we sampled and examined 200 rather than 100 fish. (wikipedia.org)
The estimator of a proportion is p ^ = X / n {\displaystyle {\hat {p}}=X/n} , where X is the number of 'positive' e.g., the number of people out of the n sampled people who are at least 65 years old). (wikipedia.org)
For example, if we are interested in estimating the proportion of the US population who supports a particular presidential candidate, and we want the width of 95% confidence interval to be at most 2 percentage points (0.02), then we would need a sample size of (1.96)2/ (0.022) = 9604. (wikipedia.org)
however, the distribution was non-random, with a statistically significant proportion of studies, presenting sample sizes that were multiples of ten. (qualitative-research.net)

To conduct this study, FSIS will be collecting the non-destructive surface sample alongside the N60 excision sample collection. (usda.gov)
Hence, this study aimed to conduct an integrative literature review to identify the profile of Brazilian women regularly using benzodiazepines. (bvsalud.org)

Static fridges are strategically placed across the South West to be used as drop-off points for samples before they are collected by a courier and transferred to the laboratory in Exeter. (geminidataloggers.com)

The Questionnaire Data Files contain socio-economic data, health indicators, and other related information collected during household interviews. (cdc.gov)
The Demographic, Questionnaire and Phlebotomy Examination files may be linked to the laboratory data file using the unique survey participant identifier SEQN. (cdc.gov)
The data for tourism services was collected from owners of all the hotels, 100 tourists and key informants of the area at 10% sampling intensity on pretested questionnaire for twenty years period (1997-2017). (scielo.br)

Once the objectives of the study were explained to the authorities of each school selected for the study, meetings were held with the girls and then with their parents to explain the objectives of the study and request their consent to participate in it. (scirp.org)

Read the General Documentation on Laboratory Data file for detailed data processing and editing protocols. (cdc.gov)
Read the General Documentation on Laboratory Data file for detailed QA/QC protocols. (cdc.gov)

In this paper, we address this research gap by conducting a simulation study to evaluate the effect of changing (1) the number of subjects, (2) the number of occasions, and (3) the between subjects variability on parameter estimates obtained by the mHMM. (arxiv.org)
But during the PHA process, health assessors often consider exposure pathways first and then evaluate sampling data based on their understanding of the completed and potential pathways. (cdc.gov)
Rather, health assessors must understand why data were collected and what they represent before using them to evaluate environmental exposures. (cdc.gov)
This study aims to empirically evaluate the roles of pilot trials in informing the effect and sample size estimates of a full-scale trial. (bmj.com)
Therefore, objective of this study was to evaluate eco-tourism and carbon stock services of the Maindam valley, District Swat, Pakistan. (scielo.br)

The aim of this work, therefore, was to systematically investigate the influence of freezing procedures and storage temperatures and their effect on NMR spectra as a potentially disturbing aspect for NMR-based metabolomics studies. (mdpi.com)

The authors have undertaken the daunting task of surveying the sampling literature of the past decade to provide an outstanding research reference. (routledge.com)

In this work, we show that whittling down the neighborhood graph through consistent sampling of nodes and edges makes SALSA and its cousins both faster (more eﬃcient) and better (more eﬀective). (sciweavers.org)

Sample size determination is the act of choosing the number of observations or replicates to include in a statistical sample. (wikipedia.org)
In practice, the sample size used in a study is usually determined based on the cost, time, or convenience of collecting the data, and the need for it to offer sufficient statistical power. (wikipedia.org)
Sample sizes may be chosen in several ways: using experience - small samples, though sometimes unavoidable, can result in wide confidence intervals and risk of errors in statistical hypothesis testing. (wikipedia.org)
using a target for the power of a statistical test to be applied once the sample is collected. (wikipedia.org)
It's essential to design a replication study with enough statistical power. (springer.com)

Additionally, the Centers for Disease Control and Prevention (CDC) has selected reducing SSB intake as a target behavior for preventing and controlling obesity and supports states in working on state-level data to prioritize subgroups that may need more targeted interventions for SSB reduction. (cdc.gov)

The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. (wikipedia.org)

However, this approach will make the designed replication study underpowered since we are only interested in the positive associations from the primary study and the problem of the "winner's curse" will occur. (springer.com)
Whilst numerous tools exist to quantify QC metrics, there is no common approach to flexibly integrate these across tools and large sample sets. (nih.gov)
However, a combination of light traps and drift nets would reduce the biases associated with size and species selectivity found for individual gears, and this approach would be preferable for sampling small tropical streams. (bioone.org)

GfK also found similar levels of overstatement on three characteristics - had lasik surgery, suffers from gout, and has changed banks - that have proven to be markers of sample representativeness. (gfk.com)
Drift nets and light traps were identified a priori as the most appropriate gears for sampling in these systems based on stream characteristics (including accessibility, size, and morphology). (bioone.org)
Objective This study sought to observe changes in cigarette design characteristics and reported tar, nicotine and carbon monoxide (TNCO) levels in a sample of cigarette brands obtained in seven Chinese cities from 2009 to 2012. (bmj.com)
Our objective was to describe SSB intake (regular soda/fruit drinks) in adults by using a state-specific data source and to examine the associations between SSB intake and sociodemographic and behavioral characteristics. (cdc.gov)

It also shows that, at a relatively low read depth, 100,000 reads, minimal complexity samples can reach saturation quickly. (genomeweb.com)

In addition, GfK found that certain demographic groups - including males, Hispanics, and those from low-income households - are more frequently under-represented in sample sources or drive higher survey fail rates. (gfk.com)
The German Socio-Economic Panel (SOEP) serves a global research community by providing representative annual longitudinal data of private households in Germany. (diw.de)

Methods14

Analyses10

Dataset4

Respondents4

20185

Wastewater6

Estimation4

Contaminant1

20162

Findings7

Bias8

Relative sampling e1

NHANES9

Analytic2

Serum samples4

Analytical1

20201

Nchs1

Feasibility1

Participants4

Outcomes4

Procedure2

Longitudinal study1

Calculation5

Representative sample4

Variance3

Genetic data3

Spatial1

Method15

Participation2

Quantitative1

Analysis15

Datasets5

Continuous3

Nationally representative1

Efficiency1

Results9

Collects2

Diagnosis2

Tissues1

Observational1

Gather1

Concentrations1

Pathogens1

Geological Survey2

Approaches2

Typically2

Biological2

Volunteer2

Gaps1

Cohort3

Proportion4

Conduct2

Transferred to the laboratory1

Questionnaire3

Objectives1

Laboratory2

Evaluate5

Procedures1

Decade1

Consistent1

Statistical5

Reduction1

Empirical1

Approach3

Characteristics4

Complexity1

Households2