“…Seventeen of 23 studies (74%) used self-reports (includes diaries and questionnaires) only, 1,2,22,36–40,44,46,47,49–54 4 of 23 used objective instruments (ie, polysomnography [PSG] or actigraphy) only (17%), 42,43,45,55 and 2 studies used both (9%). 41,48 Among studies that used self-reports, the most common measure was child-completed questionnaire (10 studies), 1,36,38–41,46,50–52 followed by parent-completed questionnaire (5 studies), 2,22,37,48,53 child-completed time diary (4 studies), 41,44,49,54 and parent-completed time diary (3 studies).…”