Table 1.

Recommended hourly cut-offs for short and long sleep in adolescents²⁵

Age (years)	Cut-off for short sleep (hour)	Cutt-off for long sleep (hour)
10	≤8.5	≥11
11	≤8	≥11
12	≤8	≥10.5
13	≤8	≥10
14	≤7.5	≥10
15	≤7	≥10
16–18	≤7	≥10