Table 2.
Comparison on sleep patterns and ecology among both samples (before and during confinement)
| Before confinement (n = 1380) | During confinement (n = 254) | comparison | |||||
|---|---|---|---|---|---|---|---|
| Median | IQR | Median | IQR | p-value** | |||
| Bedtime | 21:30 | (21:00, 22:00) | 21:36 | (21.00, 22:30) | 0.004 | ||
| % | CI 95% | % | CI 95% | PR* | 95%CI PR | p-value | |
| Total sleep time < 9 h**** | 2.3 | (1.59, 3.26) | 2.8 | (1.11, 5.59) | 1.03 | (0.39, 2.34) | 0.950 |
| > 3 night awakenings | 15.7 | (13.84, 17.75) | 12.6 | (8.78, 17.32) | 0.77 | (0.51, 1.09) | 0.153 |
| Duration of awakenings > 1 h | 16.7 | (14.80, 18.81) | 9.8 | (6.47, 14.18) | 0.57 | (0.36, 0.86) | 0.011 |
| Sleep onset latency > 30 min | 12.3 | (10.63, 14.17) | 33.9 | (28.06, 40.04) | 2.81 | (2.13, 3.67) | < 0.001 |
| “Inadequate” sleep patterns***: | |||||||
| 0 items | 65.3 | (62.71, 67.80) | 52.4 | (46.02, 58.64) | 0.81 | (0.67, 0.98) | 0.029 |
| 1 items | 25.0 | (22.73, 27.37) | 37.8 | (31.81, 44.07) | 1.49 | (1.17, 1.88) | < 0.001 |
| ≥ 2 items | 9.7 | (8.20, 11.39) | 9.8 | (6.47, 14.18) | 0.95 | (0.59, 1.47) | 0.844 |
| Parental perception of a child’s sleep problem: | |||||||
| A small problem | 21.4 | (19.24, 23.63) | 24.0 | (18.89, 29.75) | 1.10 | (0.82, 1.45) | 0.525 |
| A very serious problem | 18.1 | (16.12, 20.25) | 20.0 | (15.33, 25.54) | 1.11 | (0.81, 1.51) | 0.502 |
| A small + a very serious | 39.4 | (36.90, 42.13) | 44.1 | (37.89, 50.34) | 1.10 | (0.89, 1.35) | 0.363 |
*PR: prevalence ratio adjusted to sex, age of the child, relationship with the respondent, tobacco use, education, and sex of the respondent
**Mann–Whitney test
***According to BISQ criteria
****One missing data for total sleep time