The impact of needle exchange-based health services on emergency department use.
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OBJECTIVE: To examine the impact of the New Haven Community Health Care Van (CHCV), a mobile needle exchange-based health care delivery system, in reducing emergency department (ED) use among out-of-treatment injection drug users (IDUs) between January 1, 1996 and December 31, 1998. DESIGN: A pre-post comparison of ED utilization was performed using linked medical records from New Haven's only two emergency departments. Fixed-effect negative binomial regression analysis was used to explore the impact of the CHCV on ED use within a longitudinal cohort. SETTING: Mobile health clinic in New Haven, Conn. PARTICIPANTS: Out-of-treatment IDUs. INTERVENTION: Acute care, linkages to medical, drug treatment, and social services. MEASUREMENTS AND MAIN RESULTS: Among 373 IDUs, 117 (31%) were CHCV clients, and 256 had not used CHCV services. At baseline, CHCV users were more frequent users of ED services (P <.001). After full-scale implementation, mean ED utilization declined among CHCV clients and increased within the non-CHCV group. CHCV use is associated with statistically significant reductions in ED use, with an incidence rate ratio (IRR) of 0.79 (95% confidence interval [95% CI], 0.66 to 0.95). Subgroup analyses demonstrated significant IRR reductions, notably among Hispanics (0.65; 95% CI, 0.47 to 0.90), men (0.79; 95% CI, 0.64 to 0.98], HIV-negative IDUs (0.79; 95% CI, 0.63 to 0.98), and those with mental illness (0.75; 95% CI, 0.60 to 0.94). CONCLUSION: Needle exchange-based health care services can reduce ED utilization among high-risk injection drug users. Such services may have an important role within communities with high rates of drug use and HIV/AIDS. (+info)
Costs of providing dental services for children in public and private practices.
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This study compares the costs of providing children's dental services in three practice settings: private practices, public mobile clinics, and public fixed clinics. Some 15,000 children were provided comprehensive dental care over a three-year period. Results indicate that costs per visit and per child were lowest in mobile clinics and highest in private practices. The differential was partially explained by differences in productivity but mostly by the fact that the price of services in public practices represented costs of production, whereas in private practices they represented market values. (+info)
Importance of patient selection in evaluating a cardiac ambulance service.
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All patients brought to hospital by a special cardiac ambulance were followed up and compared with patients carried by routine ambulances to assess the effectiveness of a cardiac ambulance service. The overall mortality of patients with heart attacks was 51% among those carried by an ordinary ambulance and 40% among those carried by the cardiac ambulance. The apparently low mortality in the latter group was balanced, however, by a high mortality (68%) among patients carried by ordinary ambulances when the cardiac ambulance was available but not used; these patients tended to have a short duration of symptoms and heart attacks away from home, and their ambulance was more often called by a member of the public than a general practitioner. It seems therefore that low-risk cases were inadvertently selected for transport by the cardiac ambulance; such unintentional selection makes it difficult to evaluate a cardiac ambulance service. (+info)
A field investigation of Bacillus anthracis contamination of U.S. Department of Agriculture and other Washington, D.C., buildings during the anthrax attack of October 2001.
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In response to a bioterrorism attack in the Washington, D.C., area in October 2001, a mobile laboratory (ML) was set up in the city to conduct rapid molecular tests on environmental samples for the presence of Bacillus anthracis spores and to route samples for further culture analysis. The ML contained class I laminar-flow hoods, a portable autoclave, two portable real-time PCR devices (Ruggedized Advanced Pathogen Identification Device [RAPID]), and miscellaneous supplies and equipment to process samples. Envelopes and swab and air samples collected from 30 locations in the metropolitan area once every three days were subjected to visual examination and DNA extraction, followed by real-time PCR using freeze-dried, fluorescent-probe-based reagents. Surface swabs and air samples were also cultured for B. anthracis at the National Veterinary Service Laboratory (NVSL) in Ames, Iowa. From 24 October 2001 to 15 September 2002, 2,092 pieces of mail were examined, 405 real-time PCR assays were performed (comprising 4,639 samples), and at the NVSL 6,275 samples were subjected to over 18,000 platings. None of the PCR assays on DNA extracted from swab and air samples were positive, but viable spores were cultured from surface swabs taken from six locations in the metropolitan area in October, November, and December 2001 and February, March, and May 2002. DNA extracted from these suspected B. anthracis colonies was positive by real-time and conventional PCRs for the lethal factor, pXO1, and for capA and vrr genes; sequence analysis of the latter amplicons indicated >99% homology with the Ames, vollum, B6273-93, C93022281, and W-21 strains of B. anthracis, suggesting they arose from cross-contamination during the attack through the mail. The RAPID-based PCR analysis provided fast confirmation of suspect colonies from an overnight incubation on agar plates. (+info)
Neighborhood differences in patterns of syringe access, use, and discard among injection drug users: implications for HIV outreach and prevention education.
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The article presents results from the Syringe Access, Use, and Discard: Context in AIDS Risk research project comparing two neighborhoods by (1) socioeconomic and demographic characteristics; (2) patterns of syringe access, use, and discard; and (3) encounters with a local human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) outreach project targeted to injection drug users (IDUs). The results show that IDUs in more economically advantaged neighborhoods were more likely to acquire syringes from a single source (rather than multiple sources), more likely to inject alone in their own residence (rather than public injection locales), and more likely to dispose of syringes in private garbage cans rather alleys or dumpsters. These results are further associated with the likelihood of encountering street outreach workers, with IDUs in more affluent neighborhoods much less likely to have any such contacts. Based on the different patterns of access, use, and discard evident in each neighborhood, the results indicate that different and more carefully tailored local outreach and prevention strategies are urgently needed. (+info)
Delivering equitable care: comparing preventive services in Manitoba.
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OBJECTIVES: This study examined preventive care delivered in Manitoba during the 1990s by 3 different methods -childhood immunizations (by physicians and public health nurses under a government program), screening mammography (through a government program introduced in 1995), and cervical cancer screening (no program). METHODS: Longitudinal administrative data, an immunization monitoring system, and Canadian census databases were used. RESULTS: Cervical cancer screening rates remained static and showed strong socioeconomic differences; childhood immunization rates remained high with small socioeconomic gradients. The introduction of the Manitoba Breast Screening Program resulted in rising rates of screening and vanishing socioeconomic gradients. CONCLUSIONS: Manitoba government programs in childhood immunization and screening mammography actively helped the provision of preventive care. Organized programs that target population groups, recognize barriers to access, and facilitate self-evaluation are critical for equitable delivery. (+info)
Aortic calcification detected in a mass chest screening program using a mobile helical computed tomography unit. Relationship to risk factors and coronary artery disease.
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BACKGROUND: There is a significant relationship between calcification of the aortic arch (Arch) detected by chest X-ray examination and coronary artery disease (CAD), but the relationship between risk factors, CAD and aortic calcification detected during a mass screening program using a mobile helical computed tomography (CT) unit remains unknown. METHODS AND RESULTS: In total 2,623 subjects (1,347 men, and 1,276 women; mean age, 52.9+/-13.8) underwent an examination for lung cancer and tuberculosis using a mobile helical CT unit. The frequency of calcification was 19.6% in the Arch, 2.7% in the ascending aorta, and 10.1% in the descending aorta, values that were positively associated with age in both genders. Hypertension and smoking were significantly related to calcification of the thoracic aorta. There was a significant relationship between CAD and aortic calcification. The odds ratio of aortic calcification for patients with CAD increased as the number of calcified segments increased. CONCLUSIONS: These results suggest that detection of calcification in the thoracic aorta during a mass chest screening using a mobile helical CT unit can be used to evaluate the risk of CAD. (+info)
Adult immunization programs in nontraditional settings: quality standards and guidance for program evaluation.
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This report provides a summary of the National Vaccine Advisory Committee's (NVAC) workshop on adult immunization programs in nontraditional settings, quality standards for such programs, and guidance for program evaluation. Throughout the United States, an increasing number of adults are receiving vaccine in nontraditional settings (e.g., pharmacies and churches). Immunization programs in nontraditional settings are often more accessible and convenient than a health-care provider's office or a public health clinic, especially for medically underserved adults (e.g., economically disadvantaged, inner city, and minority populations). Medically underserved adults might be at particular risk for undervaccination because they are often without a medical home (i.e., a regular point of contact where their health-care needs are met). Immunization programs in nontraditional settings might enhance the capacity of the health-care system to effectively deliver vaccine to adults by increasing the number and types of sites where adults can receive vaccine. NVAC has recognized that strategies need to be developed to make vaccines available to all adults and that the number of immunization programs in nontraditional settings is increasing. Therefore, the Committee issues the following report, including quality standards and guidance for program evaluation. (+info)