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

6 months

10th pc

10-90th pc

90th pc

Unadjusted model

Adjusted model

Mean (SD)^a

Mean (SD)^a

Mean (SD)^a

Statistics^b

Statistics^c

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

Mean^a

Mean^a

Mean^a

Statistics^b

Statistics^c

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