Objectives To explain the use of interaction terms in nonlinear models. Study Design We
discuss the motivation for including interaction terms in multivariate analyses. We then explain …

In a classic article, Martin S. Feldstein (1973) argued that American families are in general
overinsured against medical care expenses. If insurance were reduced, the utility loss from …

Antitrust advocates believe that horizontal consolidation in hospital markets can reduce
competition and increase prices while merger advocates believe it can benefit consumers by …

Objective: To define a set of screening criteria that identifies elders who are at high risk for
repeated hospital admission in the future. Design: Longitudinal cohort study. Logistic …

We surveyed a nationally representative sample of medical group practices to assess their
current use of information technology (IT). Our results suggest that adoption of electronic …

OBJECTIVES: To measure the effects of outpatient geriatric evaluation and management (GEM)
on high‐risk older persons' functional ability and use of health services. DESIGN: …

Marginal effects can be used to express how the predicted probability of a binary outcome
changes with a change in a risk factor. For example, how does 1-year mortality risk change …

Objective We discuss how to interpret coefficients from logit models, focusing on the importance
of the standard deviation (σ) of the error term to that interpretation. Study Design We …

Odds ratios frequently are used to present strength of association between risk factors and
outcomes in the clinical literature. Odds and odds ratios are related to the probability of a …

Objectives To estimate the cost of dementia and the extra cost of caring for someone with
dementia over the cost of caring for someone without dementia. Design We developed an …