Background For many years it has been claimed that observational studies find stronger
treatment effects than randomized, controlled trials. We compared the results of observational …

The Health Care Financing Administration (HCFA) publishes hospital mortality rates each
year. We undertook a study to identify characteristics of hospitals associated with variations in …

Obesity has traditionally been re- well as the concentration of enzymes rel- garded as excess
adipose tissue. The ex- ative to t Page 1 AMERICAN JOURNAL OF EPIDEMIOLOGY Vol. …

The relationship of clinical diabetes to body fat distribution and obesity level was examined
in 15,532 women. After adjusting for relative weight, all upper body segment girth …

Background Homelessness is believed to be a cause of health problems and high medical
costs, but data supporting this association have been difficult to obtain. We compared lengths …

OBJECTIVE: The available data on antidepressant levels in nursing infants were analyzed
in order to calculate average infant drug levels and determine what factors influence plasma …

Data from 932 patients with leukemia who received bone marrow transplants were analyzed
to determine factors associated with an increased risk of developing interstitial pneumonitis. …

Data from 4225 persons from the National Health and Nutrition Examination Survey (HANES)
was used to determine whether obesity was associated with osteoarthritis (OA) or joint pain…

Objective To describe the prevalence, severity, course and predictive factors of primary
dysmenorrhoea in women of all reproductive ages. Design Prospective mailed surveys in 1985 …

This was a prospective, cluster randomized controlled trial in patients with uncontrolled
hypertension aged 21 to 85 years (mean, 61 years). Pharmacists made recommendations to …