In the November 2012 edition of Medicine & Science inSports & ExerciseA, the authors of this article determine theface and discriminant validity of an exercise vital sign (EVS)within the outpatient electronic medical records at KaiserPermanente SouthernCalifornia (1). This study had 1,793,385eligible adults 18 years and older, and of that number,1,537,798 of all eligible patients (86%) had an EVS in theirelectronic medical record after 1.5 years of implementation.In order to determine face validity, the authors compared themedian total self-reported minutes per week of exercise asmeasured by the EVS and compared them with findings fromnational population-based surveys. To determine discriminantvalidity, authors examined the ability of the EVS to discriminatebetween groups of patients with differing physicalactivity (PA) levels based on demographics and health statusby using multivariate Poisson regression models with robustvariance estimation.
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