Table 1

 Percentage (n) of children with SDSC individual factor and total sleep problem T scores in the clinical range (T scores >70) according to age in two yearly intervals

Age in years (gender n)Initiating and maintaining sleepSleep breathingArousalSleep wake transitionExcessive daytime sleepinessSleep hyperhydrosisTotal sleep problem
4.5–6.49 y (M56, F38)18.0% (17)24.4% (23)19.1% (18)27.3% (26)11.5% (11)8.4% (8)30.4% (29)
6.5–8.49 y (M37, F42)26.5% (21)18.9% (15)16.4% (13/)25.3% (20)12.6% (10)8.8% (7)27.8% (22)
8.5–10.49 y (M36, F22)24.1% (14)17.2% (10)17.2% (10)25.8% (15)6.7% (4)10.1% (6)25.8% (15)
10.5–12.49 y (M25, F23)18.7% (9)14.5% (7/)18.7% (9)12.5% (6)12.5% (6)8.3% (4)14.5% (7)
12.5–14.49 y (M24, F19)27.9% (12)7.0% (3)4.6% (2)11.6% (5)18.6% (8)6.9% (3)25.5% (11)
14.5–16.5 y (M20, F19)17.9% (7)10.2% (4)2.5% (1)7.6% (3)15.3% (6)0.0% (0)12.8% (5)
Total (M198, F163)22.7% (80)17.1% (62)14.6% (53/)20.7% (75)12.5% (45)7.7% (28)24.6% (89)