“…11 Self-reported sleep duration was provided in 27 studies. 11-23,78,79,81,86-47 91,93,96,97,99,100 , four studies by polysomnography, [83][84][85]95 two studies by actigraphy, 92,94 two studies by interview 80, 98 and in one study this information was not described. 82 The reference categories for short sleep were the following: ≤5 hours of sleep in 14 studies; 16,17,19,20,23,78,83,84,87,88,90,91,99,100 ≤6 hours of sleep in 15 studies, [11][12][13]18,21,22,[79][80][81]85,86,89,92,94,95 ≤7 hours of sleep in six studies, 14,15,82,[96][97][98] and in one study this information was not described.…”