Learn More
It is argued that P-values and the tests based upon them give unsatisfactory results, especially in large samples. It is shown that, in regression, when there are many candidate independent variables, standard variable selection procedures can give very misleading results. Also, by selecting a single model, they ignore model uncertainty and so underestimate(More)
BACKGROUND Multi-institution collaborative quality improvement programs are a well-established and broadly applicable quality improvement strategy, but there is little systematic assessment their effectiveness. OBJECTIVE To evaluate the effectiveness of a quality improvement collaborative in improving the quality of care for HIV-infected patients. (More)
Name generators used to measure egocentric networks are complex survey questions that make substantial demands on respondents and interviewers alike. They are therefore vulnerable to interviewer effects, which arise when interviewers administer questions differently in ways that affect responses-in this case, the number of names elicited. Van Tilburg(More)
BACKGROUND Nurse practitioners (NPs) and physician assistants (PAs) are primary care providers for patients with HIV in some clinics, but little is known about the quality of care that they provide. OBJECTIVE To compare the quality of care provided by NPs and PAs with that provided by physicians. DESIGN Cross-sectional analysis. SETTING 68 HIV care(More)
BACKGROUND Physicians often rely on colleagues for new information and advice about the care of their patients. OBJECTIVE Evaluate the network of influential discussions among primary care physicians in a hospital-based academic practice. DESIGN Survey of physicians about influential discussions with their colleagues regarding women's health issues. We(More)
BACKGROUND There is debate over the types of physicians who should treat patients with complex chronic medical conditions such as human immunodeficiency virus (HIV) infection. We sought to assess the relationship between specialty training and expertise and the quality of care delivered to patients with HIV infection. METHODS We selected random samples of(More)
OBJECTIVE To determine whether a selected set of indicators can represent a single overall quality construct. DESIGN Cross sectional study of data abstracted during an evaluation of an initiative to improve quality of care for people with HIV. SETTING 69 sites in 30 states. DATA SOURCES Medical records of 9020 patients. MAIN OUTCOME MEASURES(More)