VALIDITY OF SLEEP LOG COMPARED WITH ACTIGRAPHIC SLEEP-WAKE STATE

Seven women and 11 men, mean age 30.1 years, kept a sleep log for 5-7 days, and their wrist activity was monitored each minute. Sleep-wake s tate in the sleep log and actigraphic sleep-wake state were compared, and the sensitivity and specificity of the sleep log were calculated f or each subject. The ratio of agreement between these two parameters w as computed for each subject. The sensitivity and specificity of the s leep log were 72.73-97.56% (mean 86.71%) and 92.85-99.68% (mean 97.04% ), respectively. The agreement ratio was 87.30-97.85%(93.48%), but 1-h agreement ratios from midnight dropped during the sleep onset period.