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As a "thought experiment," the authors used a modified stages of change model for smoking...
BACKGROUND: Older adults are often advised to walk more, but randomized trials have not conclusively...
Consider a 3-state system with one absorbing state, such as Healthy, Sick, and Dead. Over...
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Background: Little is known about self-perceived quality of life (QOL) near the end of life,...
End-of-life studies are likely to have missing data because sicker persons are less likely to...
BACKGROUND AND OBJECTIVES: Longitudinal studies of health over time may be misleading if some people...
BACKGROUND: New health status survey instruments are often described by their psychometric (measurement) properties, such...
BACKGROUND AND OBJECTIVES: Missing information is inevitable in longitudinal studies, and can result in biased...
BACKGROUND: Commonly used measures such as the Physical Component Scale of the Short Form 36-item...
It is widely but incorrectly believed that the t-test and linear regression are valid only...
BACKGROUND: Most measures of health-related quality of life are undefined for people who die. Longitudinal...
GOAL: To estimate the probabilities of transition among self-rated health states for older adults, and...
STUDY AIMS: (1) To develop indexes measuring the degree of managedness and the covered benefits...
Studies of interventions that are intended to improve patients' health are often evaluated with survival...
Important questions about health care are often addressed by studying health care utilization. Utilization data...
Some clinical trials perform repeated measurements on patients over time, plot those measures against time,...
OBJECTIVES: In national and local discussions of health care reform, there is disagreement about whether...
Community intervention evaluations that measure changes over time may conduct repeated cross-sectional surveys, follow a...
There is considerable interest in community interventions for health promotion, where the community is the...
Measuring health status over time is problematic when some subjects die, because death does not...
In small-area variation analysis, the variation of health care utilization rates, e.g., admission rates, among...
Knowledge of the characteristics of survey non-respondents is important to determine generalizability to the population...
A variety of statistical methods can be used in small-area analysis to test whether there...
The goal of small area analysis is often to demonstrate that hospital admission rates or...
Before being introduced to wide use, health status instruments should be evaluated for reliability and...
County data on the percentage of people without health insurance are seldom available, although state...
A small-area analysis (SAA) in health services research often calculates surgery rates for several small...
Dummy variables frequently are used in regression analysis but often in an incorrect fashion. A...
Background: Women with ovarian cancer have reported abdominal=pelvic pain, bloating, difficulty eating or feeling full...
X-rays taken for ankle trauma contribute significantly to the cost of health care in this...
Cough is the fifth most common reason for physician visits, but data on acute cough...
Cluster analysis was used to separate 726 headache patients into clusters of patients with similar...
Headache classification has evolved through clinical experience because there are no objective findings which define...
Headache is the ninth most common cause of physician visits, but data on acute headaches...
Communities differ in the prevalence of various health behaviors, but it is not known to...
All small area analyses need to compare the observed variability in rates to that expected...
To see if the number of sick persons in a cohort was approximately constant over...
The process of healthy aging can best be described by plotting the trajectory of health-related...
It is difficult to distinguish changes in health due to aging from those related to...
Managed care plans may hesitate to participate in programs for uninsured persons because they fear...
Little is known about the use of services in a preferred provider organization (PPO). We...
This study assessed the relationship of race and patterns of care, defined by an expert...
We studied the process of care received by 1,680 female breast cancer patients treated in...
The Anderson model of health services utilization, which relates use of service to predisposing, enabling,...
A previous study of low-income enrollees in a closed-panel health maintenance organization (HMO) and a...
Many federally financed programs have been launched to improve the access of the poor to...
Introduction. Successful aging hasmany dimensions, whichmay manifest differently inmen and women at different ages.
Methods....
OBJECTIVES: To determine whether weight categories predict subsequent mortality and morbidity in older adults. DESIGN:...
BACKGROUND: Choosing cost-effective strategies for improving the health of the public is difficult because the...
BACKGROUND: Little is known about longitudinal associations among measures of depression, mental and physical health,...
BACKGROUND: Overweight older adults are often counseled to lose weight, even though there is little...
OBJECTIVES: To describe and compare patterns of change in self-rated health for older adults before...
Cost-effectiveness studies often need to compare the cost of a program to the lifetime benefits...
BACKGROUND: There have been few long-term follow-up studies of older adults who follow different dietary...
OBJECTIVES: This study assesses the relationship of body mass index to 5-year mortality in a...
PURPOSE: To explore the association of major depressive symptoms with advancing age, sex, and self-rated...
Introduction. The traditional definitions of overweight and obesity are not age specific, even though the...
