Bedtimes of 11 to 14-year-old children in north-east England

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Abstract
Summary: As part of a longitudinal study of diet and dental caries, 405 Northumberland children initially aged 11–12 years recorded the time of going to bed on 3 consecutive days on 5 occasions over a 23-month period. The bedtimes were recorded in a personal diary and checked at private interview. Mean bedtime for the 212 females changed from 21 hr 44 min at age 11 years 7 months to 22 hr 11 min at age 13 years 3 months. Bedtime for the 193 males was, on average, 9 min later than that for the females. There was a consistent relation between bedtime and social class, with social class IV + V children going to bed, on average, 14 min later than social class I + II children. When the average age of the children was 13 years 3 months, 13% of them went to bed at or after 23.00 hr, and they were latest to bed on Saturday when their average bedtime was 22 hr 59 min.

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