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This article is an empirical evaluation of the choice of fixed cutoff points in assessing the root mean square error of approximation (RMSEA) test statistic as a measure of goodness-of-fit in Structural Equation Models. Using simulation data, the authors first examine whether there is any empirical evidence for the use of a universal cutoff, and then(More)
The noncentral chi-square distribution plays a key role in structural equation modeling (SEM). The likelihood ratio test statistic that accompanies virtually all SEMs asymptotically follows a noncentral chi-square under certain assumptions relating to misspecification and multivariate distribution. Many scholars use the noncentral chi-square distribution in(More)
Current recommendations for energy requirements in the elderly are based on assumed levels of physical activity relative to BMR (1.5 x BMR). The main aim of the present study was to establish whether these recommendations might be applicable to a randomly-selected group of free-living elderly men (all over 75 years of age). BMR was measured by indirect(More)
A project designed to pilot voluntary screening for HIV antibody and hepatitis B virus antigen (HBsAg) in women using Los Angeles County Department of Health Services prenatal clinics is described. The purpose of the study was to demonstrate that HIV testing could be integrated into an existing prenatal health care system with minimal disruption. In an(More)
A comprehensive number of body composition predictions (involving weight, height, skinfold thicknesses, bioelectrical impedance and near-infrared interactance-NIRI) were evaluated against total body water (TBW from isotope dilution), in 23 randomly selected men over 75 years old, and dual-energy X-ray absorptiometry (DXA), in 15 volunteers from this group.(More)
Sociologists have long been attentive to participation in associational life. Yet, despite being repeatedly cautioned to consider more informal groups, most researchers focus on participation in formal voluntary associations using national surveys with fixed group categories, such as the General Social Survey (GSS). In this paper, we use new GSS data on the(More)
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