TABLE 5.

BISQ Sleep Measures, According to 3 Age Groups, for the Internet Sample (N = 1018)

Sleep MeasureAge Groups, mo
0–6 (A)7–12 (B)13–18 (C)19–24 (D)24–30 (E)F
1. Nocturnal sleep duration, h8.40 ± 1.738.89 ± 1.758.76 ± 1.848.80 ± 1.599.30 ± 1.134.59*
2. Daytime sleep duration, h3.61 ± 1.802.60 ± 1.092.65 ± 1.481.92 ± .631.30 ± .8647.81
3. Total sleep duration, h12.02 ± 2.3711.49 ± 1.9911.42 ± 2.2710.72 ± 1.6310.60 ± 1.298.50
4. Sleep-onset time, h21.26 ± 1.5720.64 ± 1.2920.91 ± 1.4020.97 ± 1.1120.90 ± 1.118.74
5. Settling time, rating3.20 ± 1.162.93 ± 1.063.13 ± 1.163.19 ± 1.153.37 ± 1.093.68
6. Night wakings, no.2.69 ± 1.753.25 ± 1.933.10 ± 2.172.67 ± 1.502.10 ± 1.326.86
7. Nocturnal wakefulness, h1.37 ± 1.121.18 ± 1.101.14 ± 1.041.37 ± 1.40.71 ± .784.08*
Severe sleep problem rating, %28.8336.0733.3342.8634.15NS (χ2)
  • Scheffe's posthoc analyses for each BISQ measure: 1, A < E; 2, A > B = C > D = E; 3, A > B > D = E; 4, A < B; 5, A > B; 6, A < B = C > E; 7, A > E. NS, not significant.

  • * P < .005.

  • P < .0001.

  • P < .01.