Table 2 Prevalence of sleep irregularity by cutoffs of sleep duration SD or cutoffs of catch-up sleep in different age groups (n = 9981).
Age Group | N | Sleep duration SD ≥ 1 h | Sleep duration SD ≥ 1.5 h | Sleep duration SD ≥ 2 h | Catch-up sleep ≥ 1 h | Catch-up sleep ≥ 1.5 h | Catch-up sleep ≥ 2 h |
|---|---|---|---|---|---|---|---|
6–9 | 1239 | 16% | 3% | 0.3% | 37% | 20% | 10% |
10–13 | 1038 | 32% | 9% | 2% | 49% | 29% | 15% |
14–17 | 731 | 53% | 16% | 4% | 59% | 45% | 32% |
18–25 | 886 | 58% | 24% | 9% | 60% | 43% | 28% |
26–35 | 996 | 46% | 17% | 4% | 55% | 37% | 25% |
36–45 | 1086 | 43% | 13% | 2% | 55% | 37% | 22% |
46–55 | 1153 | 46% | 16% | 4% | 51% | 35% | 25% |
56–65 | 1240 | 42% | 13% | 3% | 49% | 31% | 18% |
66–75 | 932 | 38% | 12% | 3% | 44% | 26% | 15% |
≥ 76 | 680 | 40% | 13% | 3% | 42% | 27% | 19% |
