Validity of sleep log compared with actigraphic sleep-wake state II

Twenty-five young people (Y group), three elderly people and seven people w ith various sleep disorders (SD group) kept a sleep log for 2-7 days, and t heir wrist-activity was monitored simultaneously. The sensitivity and speci ficity of the sleep log. and the ratio of agreement between the sleep log a nd actigraphic sleep-wake state were calculated. The sensitivity and specif icity in Y group were 87.93 +/- 6.49% and 96.51 +/- 2.37%, respectively. Th e sensitivity in SD group was significantly lower than in Y group. Even in Y group one-hour agreement ratios dropped during the sleep onset period.