United States Department of State

A Re-analysis of the Reliability of Psychiatric Diagnosis

Classification systems such as diagnosis have two primary properties, reliability and validity. Reliability refers to the consistency with which subjects are classified; validit...

Work Activity and Coronary Heart Mortality

To appraise the role of physical activity in reducing coronary mortality among longshoremen, 6351 men, 35 to 74 years old upon entry, were followed for 22 years or to death or t...

A Critical Comparison of Three Strategies of Collecting Data from Households

Abstract Returns and findings from three strategies of data collection are compared. Each strategy contains personal interviews, telephone interviews, and mail questionnaires in...

Dietary and Nutritional Factors and Pancreatic Cancer: a Case-Control Study Based on Direct Interviews

Obesity is a risk factor for pancreatic cancer and appears to contribute to the higher risk of this disease among blacks than among whites in the United States, particularly amo...

Measures of body fat and related factors in normal adults—II