No data available that match "Sampling Studies"
Sample Courses - Catholic Studies - Boston CollegeRequirements for the Catholic Studies Program at Boston College ... bc home , schools , cas , catholic studies , minor , Current ...
Sample Survey Business Studies Survey 1 TemplateBusiness Studies Survey template is been created for business studies GCSE course work. ... Business Studies Survey 1 Template. This is a survey that I have created for my business studies GCSE course work ... To effectively conduct an Online Survey the first you need to decide what the objectives of the study are. And also Review the ...
Scientists sample Hudson River, NYC waterways in study on microplastics & microbeads - RiverkeeperScientists sample Hudson River, NYC waterways in study on microplastics & microbeads Ph.D. student Ye Li collects samples in ... Ph.D. student Ye Li collects samples in New York Harbor July 6 in a study of microplastic pollution. (Photos: Leah Rae / ... Blogs , Boat Blog , Scientists sample Hudson River, NYC waterways in study on microplastics & microbeads. ... They dropped a little steam-shovel-type scoop to grab a sample of the mucky bottom. Goes was also testing a new flowmeter that ...
A Study of Male Rectal Samples in Preparation for Future Rectal Microbicide Trials - Full Text View - ClinicalTrials.govA Study of Male Rectal Samples in Preparation for Future Rectal Microbicide Trials. This study has been completed. ... Study Chair:. Ian McGowan, MD, PhD. University of California, Los Angeles. Study Chair:. Peter Anton, MD. University of ... The purpose of this study is to obtain rectal samples from men to learn information that may be valuable in future clinical ... The study will last approximately 7 months, with 6 weeks of follow-up. There are four groups in this study. Groups 1 and 2 will ...
Sample sizes for self-controlled case series studies - Open Research OnlineSample sizes for self-controlled case series studies.. Statistics in Medicine, 25(15) pp. 2618-2631. ... We derive several formulae for the sample size required for a study designed using the self-controlled case series method ... We extend this method to allow for age effects, which can have a big impact on the sample size needed. This more general sample ... epidemiology; likelihood ratio; power; sample size; self-controlled case series. Academic Unit/School:. Faculty of Science, ...
Studying Genes in Tissue Samples From Younger and Adolescent Patients With Soft Tissue Sarcomas - Full Text View -...Tissue Study Population Description: Existing NRSTS samples from the COG D9902/ARST0332 studies Sampling Method: Non- ... Studying Genes in Tissue Samples From Younger and Adolescent Patients With Soft Tissue Sarcomas. This study has been completed ... This research trial studies genes in tissue samples from younger and adolescent patients with soft tissue sarcomas. Studying ... Correlative studies Archived DNA tissue samples are analyzed for frequency of genetic mutations, including SNPs, SNVs, and ...
First Study to Evaluate the Capacity of Maraviroc Drug to Protect Against HIV Infection in Samples of Rectal Mucosa From...The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study ... First Study to Evaluate the Capacity of Maraviroc Drug to Protect Against HIV Infection in Samples of Rectal Mucosa From ... Study Type:. Interventional Study Design:. Allocation: Non-Randomized. Intervention Model: Parallel Assignment. Masking: None ( ... Study visits will occur at enrollment and at days 0, 7, 9, 14 and 16. All study visits will include a physical examination, ...
https://clinicaltrials.gov/ct2/show/NCT01719627?term=Pre-exposure prophylaxis AND "PRep" OR "HIV prevention" AND "PRep"&recr=Open&cond=HIV&rank=18
Studying Blood Samples in Women With Breast Cancer or a History of Breast Cancer - No Study Results Posted - ClinicalTrials.govStudying Blood Samples in Women With Breast Cancer or a History of Breast Cancer. This study has been completed. ... The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study ...
Study of Blood Samples From Patients With Malignant Melanoma, Metastatic Breast Cancer, Advanced Lung Cancer, Pancreatic Cancer...RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about changes that ... PURPOSE: This research study is looking at blood samples from patients with malignant melanoma, metastatic breast cancer, ... Study of Blood Samples From Patients With Malignant Melanoma, Metastatic Breast Cancer, Advanced Lung Cancer, Pancreatic Cancer ... OUTLINE: This is a multicenter study.. Blood samples are collected before surgical intervention or treatment to assess peptide ...
https://clinicaltrials.gov/ct2/show/NCT00974610?term=neoplasms [CONDITION] AND child [AGE-GROUP]&recr=Open&rank=9
Diagnostic Study of Combined Biomnarker Testing in Bronchoalveolar Lavage Samples of Immunocompromised PatientsThe aim of our prospective and multicentre diagnostic study is therefore to elucidate on the sensitivity and specificity rates ... in BAL samples.. Additionally, if genomic material of Aspergillus fumigatus is detected by PCR in a clinical. sample, we ... have been validated in clinical trials for blood samples, however the clinical significance. of testing BAL samples is up to ... study will be approximately 24 months. Inclusion Criteria:. - acute leukemia or after allogeneic stem cell transplantation. - ...
Time Sampling: Definition & Examples - Video & Lesson Transcript | Study.comDid you know that there are three different types of time sampling? Learn more about time sampling from examples, then test your knowledge with a...
No data available that match "Sampling Studies"
(1/1913) Influence of sampling on estimates of clustering and recent transmission of Mycobacterium tuberculosis derived from DNA fingerprinting techniques.
The availability of DNA fingerprinting techniques for Mycobacterium tuberculosis has led to attempts to estimate the extent of recent transmission in populations, using the assumption that groups of tuberculosis patients with identical isolates ("clusters") are likely to reflect recently acquired infections. It is never possible to include all cases of tuberculosis in a given population in a study, and the proportion of isolates found to be clustered will depend on the completeness of the sampling. Using stochastic simulation models based on real and hypothetical populations, the authors demonstrate the influence of incomplete sampling on the estimates of clustering obtained. The results show that as the sampling fraction increases, the proportion of isolates identified as clustered also increases and the variance of the estimated proportion clustered decreases. Cluster size is also important: the underestimation of clustering for any given sampling fraction is greater, and the variability in the results obtained is larger, for populations with small clusters than for those with the same number of individuals arranged in large clusters. A considerable amount of caution should be used in interpreting the results of studies on clustering of M. tuberculosis isolates, particularly when sampling fractions are small. (+info)
(2/1913) Correlates of sexually transmitted bacterial infections among U.S. women in 1995.
CONTEXT: Sexually transmitted diseases (STDs) of bacterial origin such as gonorrhea and chlamydial infection can lead to pelvic inflammatory disease (PID) and infertility. Identifying behaviors and characteristics associated with infection may assist in preventing these often asymptomatic diseases and their sequelae. METHODS: Data from 9,882 sexually active women who participated in the 1995 National Survey of Family Growth describe the characteristics of women who report a history of infection with a bacterial STD or of treatment for PID. Multivariate analysis is used to determine which demographic characteristics and sexual and health-related behaviors affect the likelihood of infection or the occurrence of complications. RESULTS: Overall, 6% of sexually active women reported a history of a bacterial STD, and 8% reported a history of PID. Women who first had sexual intercourse before age 15 were nearly four times as likely to report a bacterial STD, and more than twice as likely to report PID, as were women who first had sex after age 18. Having more than five lifetime sexual partners also was associated with both having an STD and having PID. PID was more common among women reporting a history of a bacterial STD (23%) than among women who reported no such history (7%). In multivariate analyses, age, race, age at first intercourse and lifetime number of sexual partners had a significant effect on the risk of a bacterial STD. Education, age, a history of IUD use, douching and a history of a bacterial STD had a significant impact on the risk of PID, but early onset of intercourse did not, and lifetime number of partners had only a marginal effect. CONCLUSIONS: The pattern of characteristics and behaviors that place women at risk of infection with bacterial STDs is not uniform among groups of women. Further, the level of self-reported PID would suggest higher rates of gonorrhea and chlamydial infection than reported. (+info)
(3/1913) Where do people go for treatment of sexually transmitted diseases?
CONTEXT: Major public health resources are devoted to the prevention of sexually transmitted diseases (STDs) through public STD clinics. However, little is known about where people actually receive treatment for STDs. METHODS: As part of the National Health and Social Life Survey, household interviews were performed from February to September 1992 with 3,432 persons aged 18-59. Weighted population estimates and multinomial response methods were used to describe the prevalence of self-reported STDs and patterns of treatment utilization by persons who ever had a bacterial or viral STD. RESULTS: An estimated two million STDs were self-reported in the previous year, and 22 million 18-59-year-olds self-reported lifetime STDs. Bacterial STDs (gonorrhea, chlamydia, nongonococcal urethritis, pelvic inflammatory disease and syphilis) were more common than viral STDs (genital herpes, genital warts, hepatitis and HIV). Genital warts were the most commonly reported STD in the past year, while gonorrhea was the most common ever-reported STD. Almost half of all respondents who had ever had an STD had gone to a private practice for treatment (49%); in comparison, only 5% of respondents had sought treatment at an STD clinic. Respondents with a bacterial STD were seven times more likely to report going to an STD clinic than were respondents with a viral STD--except for chlamydia, which was more likely to be treated at family planning clinics. Men were significantly more likely than women to go to an STD clinic. Young, poor or black respondents were all more likely to use a family planning clinic for STD treatment than older, relatively wealthy or white respondents. Age, sexual history and geographic location did not predict particular types of treatment-seeking. CONCLUSIONS: The health care utilization patterns for STD treatment in the United States are complex. Specific disease diagnosis, gender, race and income status all affect where people will seek treatment. These factors need to be taken into account when STD prevention strategies are being developed. (+info)
(4/1913) Women's interest in vaginal microbicides.
CONTEXT: Each year, an estimated 15 million new cases of sexually transmitted diseases (STDs), including HIV, occur in the United States. Women are not only at a disadvantage because of their biological and social susceptibility, but also because of the methods that are available for prevention. METHODS: A nationally representative sample of 1,000 women aged 18-44 in the continental United States who had had sex with a man in the last 12 months were interviewed by telephone. Analyses identified levels and predictors of women's worry about STDs and interest in vaginal microbicides, as well as their preferences regarding method characteristics. Numbers of potential U.S. microbicide users were estimated. RESULTS: An estimated 21.3 million U.S. women have some potential current interest in using a microbicidal product. Depending upon product specifications and cost, as many as 6.0 million women who are worried about getting an STD would be very interested in current use of a microbicide. These women are most likely to be unmarried and not cohabiting, of low income and less education, and black or Hispanic. They also are more likely to have visited a doctor for STD symptoms or to have reduced their sexual activity because of STDs, to have a partner who had had other partners in the past year, to have no steady partner or to have ever used condoms for STD prevention. CONCLUSIONS: A significant minority of women in the United States are worried about STDs and think they would use vaginal microbicides. The development, testing and marketing of such products should be expedited. (+info)
(5/1913) Pregnancies averted among U.S. teenagers by the use of contraceptives.
CONTEXT: The personal and social costs associated with teenage pregnancy in the United States concern many policymakers and researchers, yet the role of contraception in preventing these pregnancies has not been adequately quantified. METHODS: Published estimates of contraceptive effectiveness were applied to 1995 National Survey of Family Growth data on sexual and contraceptive practices in order to estimate the number of pregnancies averted through the use of contraceptives by U.S. teenagers. Four scenarios of contraceptives access--from current levels of access to highly restricted access--and teenagers' sexual and contraceptive practices in response to such restrictions are used to project the potential impact on pregnancies among teenagers. RESULTS: Current levels of contraceptive use averted an estimated 1.65 million pregnancies among 15-19-year-old women in the United States during 1995. If these young women had been denied access to both prescription and over-the-counter contraceptive methods, an estimated one million additional pregnancies (ranging from 750,000 to 1.25 million) would have occurred, assuming some decrease in sexual activity. These pregnancies would have led to 480,000 live births, 390,000 abortions, 120,000 miscarriages, 10,000 ectopic pregnancies and 37 maternal deaths. CONCLUSIONS: Contraceptive use by teenage women prevents pregnancies and negative pregnancy-related health consequences that can disrupt the lives of adolescent women and that have substantial societal costs. Continued and expanded access to contraceptives for adolescents is a critically important public health strategy. (+info)
(6/1913) Ethanol as a hypnotic in insomniacs: self administration and effects on sleep and mood.
The purpose of this study was to assess the effects of low ethanol doses on sleep and mood and to assess its reinforcing effects used as a hypnotic. Twenty healthy adults, aged 21-45 yrs, all moderate social drinkers, were studied: eleven subjects had insomnia and nine were normal sleepers, as documented by clinical polysomnography. On two sampling nights each, ethanol (0.5 g/kg) or placebo was administered before sleep in color-coded cups presented in three doses (0.2, 0.2, and 0.1 g/kg) separated by 15 min. On three subsequent nights subjects chose their preferred presleep beverage (0.2 g/kg ethanol or placebo) based on cup color and were given an opportunity for 3 additional refills (0.2 g/kg each) of the chosen beverage at 15 min intervals, yielding a total possible dose of 0.8 g/kg. Insomniacs chose ethanol 67% of nights and normals 22%. Insomniacs chose significantly more ethanol refills than normals for an average nightly dose of 0.45 g/kg and normals took significantly more placebo refills. On the sampling nights 0.5 g/kg ethanol reduced REM sleep for both groups for the 8-hr sleep period and in insomniacs increased stage 3-4 sleep and reduced stage 1 sleep during the first half of the night to the level seen in the normals. Other sleep variables were not altered in either group or halves of the night. Presleep improvements in the Profile of Mood States tension and concentration factors were also associated with ethanol administration. Thus, acutely, both sleep and mood effects appear to be associated with the reinforcing effects of ethanol as a hypnotic for insomniacs. (+info)
(7/1913) Prevalence and social correlates of cardiovascular disease risk factors in Harlem.
OBJECTIVES: This study examined the prevalence, social correlates, and clustering of cardiovascular disease risk factors in a predominantly Black, poor, urban community. METHODS: Associations of risk factor prevalences with sociodemographic variables were examined in a population-based sample of 695 men and women aged 18 to 65 years living in Central Harlem. RESULTS: One third of the men and women were hypertensive, 48% of the men and 41% of the women were smokers, 25% of the men and 49% of the women were overweight, and 23% of the men and 35% of the women reported no leisure-time physical activity over the past month. More than 80% of the men and women had at least 1 of these risk factors, and 9% of the men and 19% of the women had 3 or more risk factors. Income and education were inversely related to hypertension, smoking, and physical inactivity. Having 3 or more risk factors was associated with low income and low education (extreme odds ratio [OR] = 10.2, 95% confidence interval [CI] = 3.0, 34.5 for education; OR = 3.7, CI = 1.6, 8.9 for income) and with a history of unstable work or of homelessness. CONCLUSIONS: Disadvantaged, urban communities are at high risk for cardiovascular disease. These results highlight the importance of socioenvironmental factors in shaping cardiovascular risk. (+info)
(8/1913) Changing trends in barriers to cataract surgery in India.
Cataract is a major cause of blindness in Asia. Efforts in India to provide cataract surgical services have had limited success in reaching the cataract-blind population. Earlier studies identified the major barriers to cataract surgery as poverty, lack of transportation or felt need, or sex related; and the critical barriers in rural areas as lack of awareness, difficult access, and cost. Compared with these earlier data, the results of the present study in Karnataka State indicate a shift in the character of the barriers. They now appear to be more related to case selection and service provision. These shifts are analysed and alternative strategies to increase the uptake to cataract surgery are recommended. (+info)
- Study visits will occur at enrollment and at days 0, 7, 9, 14 and 16. (clinicaltrials.gov)
- To effectively conduct an Online Survey the first you need to decide what the objectives of the study are. (questionpro.com)
- And also Review the basic objectives of the study. (questionpro.com)
- The study will evaluate the differences in rectal tissue from HIV infected or uninfected males who either engage in anal-receptive sex (men who sleep with men, or MSM) or do not have anal-receptive sex. (clinicaltrials.gov)
- Scientists from Columbia University's Lamont-Doherty Earth Observatory are conducting a pilot study and testing their methods in research into microbeads and other bits of plastic, along with the contaminants they carry. (riverkeeper.org)
- Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. (clinicaltrials.gov)
- Archived DNA tissue samples are analyzed for frequency of genetic mutations, including SNPs, SNVs, and small deletions and/or insertions, by PCR and mass spectometry (Sequenom MassARRAY). (clinicaltrials.gov)
- Study of Blood Samples From Patients With Malignant Melanoma, Metastatic Breast Cancer, Advanced Lung Cancer, Pancreatic Cancer, or Colorectal Cancer. (clinicaltrials.gov)
- This study will assess the potential of MVC as a 'on demand' pre-exposure prophylaxis, within a strategy for the prevention of HIV infection in men who have sex with men (MSM). (clinicaltrials.gov)
- Blood samples are collected before surgical intervention or treatment to assess peptide and protein markers. (clinicaltrials.gov)
- The results of the first efficacy trials of ARV-based PrEP showed fewer HIV infections among study participants receiving the study drugs compared to those receiving placebo. (clinicaltrials.gov)
- These serologic markers, mainly galactomannan (GM) and recently 1(1,3)-β-D-glucan (BDG), have been validated in clinical trials for blood samples, however the clinical significance of testing BAL samples is up to now only based on retrospective data for GM and has not been reported yet for BDG. (knowcancer.com)
- Listing of a study on this site does not reflect endorsement by the National Institutes of Health. (clinicaltrials.gov)
- Left: Topographic map of the investigated area with sampling site shown as red circle. (mit.edu)
- Here, we investigate by rRNA and ITS amplicon sequencing the diversity of microorganisms from the three domains of life (Archaea, Bacteria and Eukaryota:Fungi) in soil samples taken from the forest experimental site of Breuil-Chenue (France). (nature.com)
- The aim of our prospective and multicentre diagnostic study is therefore to elucidate on the sensitivity and specificity rates of these serologic markers in combination with molecular tools (both an Aspergillus specific and a multifungal PCR based assay), as serologic markers are not pathogen-specific, and furthermore to define species-specific cut-off values for BDG in BAL samples. (knowcancer.com)
- Clinical samples (BAL and blood) from approximately 100 pts suffering from acute leukemia and pts after allogeneic stem cell transplantation with febrile neutropenia and lung infiltrates diagnosed in a chest CT scan suggestive for fungal infection will be investigated after pts`s informed consent in a multicentre, prospective trial. (knowcancer.com)
- We derive several formulae for the sample size required for a study designed using the self-controlled case series method without age effects. (open.ac.uk)
- We extend this method to allow for age effects, which can have a big impact on the sample size needed. (open.ac.uk)
- An anoscopy (examination of the anus, anal canal, and lower rectum) and blood draw will be conducted at screening, study entry, and Weeks 2 and 4. (clinicaltrials.gov)
- All study visits will include a physical examination, blood collection and storage and in the basal visit and a day 7 or 9 the participants will undergo a colonoscopy. (clinicaltrials.gov)
- BAL and blood samples will be tested additionally for GM, BDG and with a diagnostic nested Aspergillus PCR assay, a multifungal DNA-Microarray and an azole resistance PCR assay. (knowcancer.com)
- They dropped a little steam-shovel-type scoop to grab a sample of the mucky bottom. (riverkeeper.org)
- Cultivation-independent studies have also shown an increase in the relative abundance of specific functional genes related to nitrogen cycling, carbon fixation, phosphorus utilization, metal homeostasis and resistance in the rhizosphere 21 , 23 . (nature.com)
- The purpose of this study is to obtain rectal samples from men to learn information that may be valuable in future clinical trials of rectal microbicides. (clinicaltrials.gov)
- The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. (clinicaltrials.gov)
- Please remove one or more studies before adding more. (clinicaltrials.gov)
- In this video Giovanni Passoni, Managing Director at Velp Scientifica, discusses the new OXITEST instrument, which has been designed to effectively study the shelf-life of food samples. (selectscience.net)
- Until recently, few studies have holistically examined the mean TPs of all animals in food webs, with the exception of a study by Williams & Martinez (2004), which reconstructed a trophic network to estimate the average TP for a whole community by using a large dataset based on gut contents 15 . (nature.com)
- In the present study, we propose a new index of food web properties, the integrated trophic position (iTP), which we defined as the summed TPs of all animals in a food web integrated by their individual biomass. (nature.com)
- Several studies have investigated the main biotic and abiotic factors determining the structure and functioning of soil microbial communities. (nature.com)
- Additionally, if genomic material of Aspergillus fumigatus is detected by PCR in a clinical sample, we investigate fungal DNA for point mutations in the cyp51A gene mediating resistance against common mould-active triazoles with novel rapid, sensitive and specific, non-culture-based PCR-assays and sequencing to optimize antifungal treatment as early as possible. (knowcancer.com)
- It should be noted that the iTP for macroinvertebrates in the present study does not include primary producers (i.e. (nature.com)
- Listing a study does not mean it has been evaluated by the U.S. Federal Government. (clinicaltrials.gov)
- Choosing to participate in a study is an important personal decision. (clinicaltrials.gov)
- To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. (clinicaltrials.gov)
- this information may be useful for future rectal microbicide safety and efficacy studies. (clinicaltrials.gov)
- A Buffalo native, she studied English at the University of Toronto. (riverkeeper.org)
- This more general sample size formula is also found to perform well in a broad range of situations. (open.ac.uk)
- The study will last approximately 7 months, with 6 weeks of follow-up. (clinicaltrials.gov)
- Joaquim I Goes, Research Professor at Lamont-Doherty Earth Observatory, collects samples along the Hudson River. (riverkeeper.org)
- Talk with your doctor and family members or friends about deciding to join a study. (clinicaltrials.gov)