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Table 3 Multivariate logistic regression analysis predicting the incidence of sleep-related problems

From: Association between delayed bedtime and sleep-related problems among community-dwelling 2-year-old children in Japan

  Struggles at bedtime Wakes up in negative mood Hard time getting out of bed Takes a long time to be alert Has bad appetite in the morning
  OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI) OR (95% CI)
Model 1 (unadjusted)
2100hG 2.1 (1.2-3.6)* 1.2 (0.6-2.2) 2.6 (0.8-8.2) 2.4 (0.9-6.3) 1.5 (0.7-3.3)
2130hG 1.8 (1.0-3.5) 1.8 (0.9-3.5) 5.4 (1.7-17.4)** 4.3 (1.6-11.6)** 3.7 (1.7-8.3)**
2200h or later G 4.2 (2.3-7.7)** 2.2 (1.2-4.2)* 8.4 (2.7-25.5)** 4.5 (1.7-11.8)** 4.1 (1.9-8.8)**
Model 2 (adjusted for age, gender)
2100hG 2.0 (1.1-3.5)* 1.1 (0.6-2.0) 2.6 (0.8-8.5) 2.3 (0.9-6.2) 1.5 (0.7-3.3)
2130hG 1.7 (0.9-3.2) 1.7 (0.9-3.3) 5.5 (1.7-18.0)** 4.0 (1.5-11.1)** 3.6 (1.6-8.1)**
2200h or later G 3.6 (1.9-6.7)** 2.0 (1.0-3.7)* 8.2 (2.6-25.4)** 4.3 (1.6-11.6)** 3.8 (1.7-8.4)**
Model 3 (adjusted for age, gender, total sleep time, nap time, bedtime irregularity)
2100hG 1.8 (1.0-3.3)* 0.9 (0.5-1.7) 2.1 (0.6-7.1) 2.2 (0.8-6.0) 1.5 (0.7-3.4)
2130hG 1.4 (0.7-2.8) 1.4 (0.7-2.8) 4.3 (1.3-14.8)* 3.9 (1.4-11.3)* 3.6 (1.5-8.4)**
2200h or later G 2.9 (1.5-5.6)** 1.5 (0.7-3.0) 5.9 (1.7-20.0)** 4.1 (1.4-12.0)* 3.8 (1.6-8.8)**
  1. OR: odd ratios, 95% CI: 95% confidence interval, *p < 0.05, **p < 0.01. Up to 2100h G was used as the reference category in each model. For a clearer explanation, all of statistically significant results were presented in bold.