Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Unadjusted analyses between sleep duration, bedtime, and pubertal timing
| Sleep, N (%) | Pubertal timing N (%) | χ2 | P | |
|---|---|---|---|---|
| On time | Early | |||
| Sleep duration | ||||
| Insufficient, 833 (15.3) | 580 (69.6) | 253 (30.4) | 30.003 | < 0.001 |
| Sufficient, 4628 (84.7) | 3624 (78.3) | 1004 (21.7) | ||
| Bedtime groups | ||||
| ≤ 10 pm, 4147 (75.9) | 3246 (78.3) | 901 (21.7) | 16.216 | < 0.001 |
| > 10 pm, 1314 (24.1) | 958 (72.9) | 356 (27.1) | ||
