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Daily Social Rhythms in the Elderly and Their Relation to Objectively Recorded Sleep
1992
Sleep
This study tested the hypothesis that the impaired sleep of healthy 71-91 year olds might be due to circadian dysfunction stemming from irregularity of life·style. Twenty-five old women, 20 old men and 21 young controls (19-28 years old) were studied in relation to 1) objective sleep as measured in the laboratory, 2) subjective sleep quality as measured by the Pittsburgh sleep quality index (PSQI) and 3) the social rhythm metric (SRM), an instrument to quantify the daily rhythms of life.
doi:10.1093/sleep/15.4.322
fatcat:64sazjftxrg75gw5hmtatccsry