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Table 3 Unadjusted analyses between sleep duration, bedtime, and pubertal timing

From: The association between sleep duration, bedtimes, and early pubertal timing among Chinese adolescents: a cross-sectional study

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)

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Environmental Health and Preventive Medicine

ISSN: 1347-4715

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