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Estimated versus observed sleep time during daytime observations from the best-performing algorithm for detecting daytime sleep. Left: ActiGraph, Sadeh (minimum time in sleep = 15, minimum time in bed = 5) (F2 score = 0.57, Specificity = 0.77). Middle: ActiGraph, Cole-Kripke (minimum time in sleep = 15, minimum time in bed = 10) (F2 score = 0.59, Specificity = 0.69). Right: Actiwatch, Medium threshold (minimum time in sleep = 15) (F2 score = 0.52, Specificity = 0.80).
