TABLE 1.

Summary Measures (Mean ± Standard Deviation or Percentage and 95% CI) for Explanatory and Outcome Variables

VariableAll Participants (n = 866)Hyperactive* (n = 98)Not Hyperactive (n = 768)
Age (y)6.8 ± 3.27.8 ± 3.36.6 ± 3.2
Male (%)54 (51, 57)73 (65, 82)52 (48, 55)
Ever snores (%)59 (56, 62)62 (52, 72)59 (55, 62)
Habitually snores (%)16 (13, 19)22 (13, 31)15 (13, 18)
Always snores (%)9 (7, 11)14 (7, 21)8 (6, 10)
Snoring score0.17 ± 0.280.23 ± 0.340.17 ± 0.27
Sleepiness score0.16 ± 0.240.31 ± 0.320.14 ± 0.22
SDB score0.15 ± 0.150.24 ± 0.170.14 ± 0.14
IHS0.54 ± 0.561.81 ± 0.470.38 ± 0.31
IHS >1.25 (%)12 (10, 14)1000
HI47 ± 1371 ± 1544 ± 9
HI >60 (%)13 (11, 16)69 (60, 79)6 (5, 8)
  • * Participants with IHS above 1.25. (This measure was used to split results because it is, in contrast to the hyperactivity index, unadjusted for age and sex.)