THE PITTSBURGH SLEEP DIARY

Increasingly, there is a need in both research and clinical practice t o document and quantify sleep and waking behaviors in a comprehensive manner. The Pittsburgh Sleep Diary (PghSD) is an instrument with separ ate components to be completed at bedtime and waketime. Bedtime compon ents relate to the events of the day preceding the sleep, waketime com ponents to the sleep period just completed. Two-week PghSD data is pre sented from 234 different subjects, comprising 96 healthy young middle -aged controls, 37 older men, 44 older women, 29 young adult controls and 28 sleep disorders patients in order to demonstrate the usefulness , validity and reliability of various measures from the instrument. Co mparisons are made with polysomnographic and actigraphic sleep measure s, as well as personality and circadian type questionnaires. The instr ument was shown to have sensitivity in detecting differences due to we ekends, age, gender, personality and circadian type, and validity in a greeing with actigraphic estimates of sleep timing and quality. Over a 12-31 month delay, PghSD measures of both sleep timing and sleep qual ity showed correlations between 0.56 and 0.81 (n = 39, P < 0.001).