Table 1.
Descriptive statistics for all variables.
| Measure | Range | M | SD | Skewness | Kurtosis |
|---|---|---|---|---|---|
| CSHQ | |||||
| Sleep Onset Delay | 1–2 | 1.23 (1.25)a | 0.43 (0.53)a | 1.33 | −0.26 |
| Sleep Duration | 3–6 | 3.40 (3.41)a | 0.77 (0.93)a | 2.06 | 3.90 |
| Night Wakings | 3–7 | 3.50 (3.51)a | 1.08 (0.89)a | 2.59 | 6.42 |
| Sleep Disordered Breathing | 3–5 | 3.23 (3.24)a | 0.57 (0.63)a | 2.43 | 5.04 |
| Polysomnography | |||||
| Sleep Latency (min) | 3.80–74.40 | 25.42 (21.8)b | 19.76 (23.5)b | 1.31 | 0.99 |
| Total Sleep Time (min) | 384.00–599.30 | 489.55 (512.2)b | 55.30 (61.7)b | 0.04 | −0.52 |
| Wake After Sleep Onset (%) | 1.30–32.10 | 13.40 (5.1)b | 7.78 (5.2)b | 0.36 | −0.51 |
| RDI | 0.00–0.00 | 0.00 (1.98)c | 0.00 (1.39)c | – | – |
| Actigraphy | |||||
| Sleep Latency (min) | 2.25–81.00 | 21.64 (21.8)b | 17.23 (23.5)b | 1.85 | 4.09 |
| Sleep Minutes (min) | 288.40–598.50 | 503.24 (512.2)b | 65.92 (61.7)b | −1.40 | 2.65 |
| Wake After Sleep Onset (%) | 0.30–50.00 | 11.94 (5.1)b | 11.22 (5.2)b | 1.59 | 3.25 |
CSHQ, Children’s Sleep Habits Questionnaire; RDI, Respiratory Disturbance Index.
All values represent raw scores. Possible score ranges for each CSHQ subscale are as follows: Sleep Onset Delay (0–3), Sleep Duration (3–9), Night Wakings (3–9), and Sleep Disordered Breathing (3–9).
Community sample data from
aOwens et al. (1),
bScholle et al. (26), and
cVerhulst et al. (27) included for comparison.