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Table 1 The description of daily sleep hours and CSHQ score stratified by age and gestational in preschoolers (n = 114,311)

From: Associations between gestational age and childhood sleep: a national retrospective cohort study

  N, % Daily sleep hours
(means, SD)
CSHQ score
(means, SD)
Total 114311, 100.00% 10.715±2.693 46.706±7.576
 Very-preterm (<31W) 2379, 2.08% 10.409±3.135 48.380±8.787
 Moderate-preterm (32–33W) 1893, 1.66% 10.433±2.951 47.940±8.556
 Late-preterm (34–36W) 10238, 8.96% 10.505±2.885 47.340±8.137
 Early-term (37–38W) 29179, 25.53% 10.689±2.699 46.664±7.582
 Full-term (39–40W) 58043, 50.78% 10.780±2.616 46.464±7.355
 Late-term (41–41W) 7016, 6.14% 10.852±2.529 46.539±7.124
 Post-term (>41W) 5563, 4.87% 10.614±2.928 47.365±8.138
3 years old 37823, 100.00% 46.666±7.052 46.592±6.863
 Very-preterm (<31W) 726, 1.92% 10.339±3.231 48.906±8.893
 Moderate-preterm (32–33W) 530, 1.40% 10.432±2.97 48.502±8.75
 Late-preterm (34–36W) 3022, 7.99% 10.623±2.826 47.254±7.500
 Early-term (37–38W) 9824, 25.97% 10.802±2.639 46.846±7.293
 Full-term (39–40W) 19647, 51.94% 10.879±2.552 46.666±7.052
 Late-term (41–41W) 2435, 6.44% 10.851±2.499 47.689±7.942
 Post-term (>41W) 1639, 4.33% 10.664±2.853 46.846±7.293
4 years old 43847, 100.00% 10.708±2.685 46.781±7.545
 Very-preterm(<31W) 938, 2.14% 10.451±3.102 48.263±8.404
 Moderate-preterm (32–33W) 768, 1.75% 10.530±2.918 47.965±8.281
 Late-preterm (34–36W) 3890, 8.87% 10.530±2.857 47.511±8.096
 Early-term (37–38W) 10997, 25.08% 10.654±2.711 46.748±7.544
 Full-term (39–40W) 22276, 50.80% 10.766±2.609 46.493±7.303
 Late-term (41–41W) 2779, 6.34% 10.654±2.711 46.800±7.283
 Post-term (>41W) 2199, 5.02% 10.885±2.459 47.514±8.343
5 years old 32641, 100.00% 10.615±2.768 46.422±7.968
 Very-preterm (<31W) 715, 2.19% 10.424±3.082 48.000±9.152
 Moderate-preterm (32–33W) 595, 1.82% 10.308±2.975 47.398±8.711
 Late-preterm (34–36W) 3326, 10.19% 10.368±2.965 47.222±8.720
 Early-term (37–38W) 8358, 25.61% 10.604±2.748 46.339±7.948
 Full-term (39–40W) 16120, 49.39% 10.678±2.699 46.177±7.770
 Late-term (41–41W) 1802, 5.52% 10.802±2.673 46.065±7.203
 Post-term (>41W) 1725, 5.28% 10.534±2.953 46.957±8.124
  1. Daily sleep hours = 5/7*sleep hours on weekdays +2/7*sleep hours at the weekends
  2. CSHQ Children’s Sleep Habit Questionnaire, SD standard deviation