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Table 4 The differences between sleep category at 6 months and 12 months in predicting child inhibitory control at 30 months

From: Sleep during infancy, inhibitory control and working memory in toddlers: findings from the FinnBrain cohort study

6 months
  10th pc 10-90th pc 90th pc Unadjusted model Adjusted model
  Mean (SD)a Mean (SD)a Mean (SD)a Statisticsb Statisticsc
Night sleep duration 28.63 (8.94) 27.62 (8.38) 28.19 (8.27) F(2,317) = 0.416, p = 0.660, Ƞ2 = 0.003 F(7,306) = 0.675, p = 0.510, Ƞ2 = 0.004
Day sleep duration 27.62 (8.89) 27.79 (8.31) 28.84 (8.22) F(2,319) = 0.486, p = 0.616, Ƞ2 = 0.003 F(7,308) = 0.630, p = 0.533, Ƞ2 = 0.004
Total sleep duration 26.82 (9.68) 27.97 (8.22) 28.64 (7.92) F(2,317) = 0.403, p = 0.669, Ƞ2 = 0.003 F(7,306) = 0.095, p = 0.910, Ƞ2 = 0.001
% daytime sleep 28.23 (8.77) 27.51 (8.48) 30.34 (6.99) F(2,317) = 2.614, p = 0.075, Ƞ2 = 0.016 F(7,306) = 2.271, p = 0.089, Ƞ2 = 0.015
Night awakenings 24.80 (9.96) 28.02 (8.38) 29.03 (6.60) F(2,314) = 1.576, p = 0.208, Ƞ2 = 0.010 F(7,303) = 2.196, p = 0.113, Ƞ2 = 0.014
Time awake / night 26.18 (9.55) 28.19 (8.28) 27.47 (8.83) F(2,302) = 1.375, p = 0.254, Ƞ2 = 0.009 F(7,292) = 1.193, p = 0.305, Ƞ2 = 0.008
12 months
  10th pc 10-90th pc 90th pc Unadjusted model Adjusted model
  Meana Meana Meana Statisticsb Statisticsc
Night sleep duration 28.24 (8.98) 27.94 (8.50) 27.90 (8.03) F(2,282) = 0.230, p = 0.794, Ƞ2 = 0.002 F(7,272) = 0.329, p = 0.720, Ƞ2 = 0.002
Day sleep duration 26.44 (9.39) 28.59 (7.62) 26.09 (11.02) F(2,287) = 1.131, p = 0.324, Ƞ2 = 0.008 F(7,277) = 0.986, p = 0.374, Ƞ2 = 0.007
Total sleep duration 28.92 (8.06) 28.04 (8.07) 27.09 (10.04) F(2,280) = 0.591, p = 0.554, Ƞ2 = 0.004 F(5,277) = 0.765, p = 0.466, Ƞ2 = 0.005
% daytime sleep 24.62 (9.86) 28.70 (7.63) 25.32 (11.26) F(2,280) = 3.003, p = 0.051, Ƞ2 = 0.021 F(7,271)=3.012, p =0.039, Ƞ2 =0.022*
Night awakenings 29.15 (7.53) 27.70 (8.92) 28.93 (6.71) F(2,276) = 1.392, p = 0.876, Ƞ2 = 0.001 F(7,268) = 0.068, p = 0.934, Ƞ2 = 0.001
Time awake / night 29.42 (7.36) 28.07 (8.53) 28.46 (7.14) F(2,253) = 0.443, p = 0.643, Ƞ2 = 0.003 F(7,245) = 0.294, p = 0.746 Ƞ2 = 0.002
  1. Similar associations were obtained with non-transformed outcomes
  2. *p value> 0.050; Ƞ2=eta squared (i.e. measure of effect size in ANOVA)
  3. aMean and standard deviation (SD) of each group, in each of the sleep variables, are obtained from the raw outcome measure
  4. bUnadjusted model: No covariates
  5. cAdjusted model: gestational age, maternal education, age at 30 months, child’s sex and INTER-NDA mean cognitive score at 30 months