Psychomotor retardation found in depressed outpatient women.

Psychomotor retardation (PMR) has been found consistently in depressed inpatients. This article is the first to report PMR in depressed women outpatients in contrast to matched nondepressed controls, despite heterogeneous differences in lifestyle, using 2-week content-valid behavioral measurement. Principal findings include significant and substantial daytime activity reduction not explained by seven covariates. The absence of significant nighttime difference is explained on the basis of instrumentation limits.