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. 2011 Apr 1;34(4):451–458. doi: 10.1093/sleep/34.4.451

Table 4.

Maternal sleep (PSQI)

Baseline Week 2 Week 3 ANOVA
Variable M (SD) M (SD) M (SD) WL F P ES
    Bedtime
        Control 10.85 (1.12) 10.83 (0.99) 10.94 (1.08) 0.979 0.88 0.415 0.021
        Internet 10.88 (1.14) 10.67 (1.07) 10.68 (1.17) 0.919 4.12 0.019 0.081
        Internet & Routine 10.84 (1.00) 10.64 (1.03) 10.76 (0.95) 0.912 3.98 0.022 0.088
    Sleep Onset Latency
        Control 23.33 (21.33) 23.18 (22.59) 21.93 (34.67) 0.997 0.12 0.892 0.003
        Interneta,c 25.19 (19.16) 20.21 (13.16) 17.16 (12.24) 0.723 18.03 < 0.001 0.277
        Internet & Routinea,c 26.99 (23.35) 18.30 (13.62) 16.43 (13.91) 0.799 10.32 < 0.001 0.201
    Waketime
        Control 6.57 (0.93) 6.71 (0.95) 6.79 (0.91) 0.943 2.46 0.092 0.057
        Internet 6.66 (1.10) 6.70 (1.04) 6.82 (1.04) 0.887 5.98 0.004 0.113
        Internet & Routine 6.53 (0.92) 6.57 (0.96) 6.78 (1.01) 0.895 4.80 0.011 0.105
    Total Sleep Time
        Control 6.81 (1.15) 7.02 (1.28) 7.12 (1.19) 0.913 3.82 0.026 0.087
        Interneta,c 6.58 (1.16) 6.99 (1.05) 7.30 (1.01) 0.657 24.58 < 0.001 0.343
        Internet & Routinea,c 6.71 (1.11) 7.15 (1.13) 7.49 (1.15) 0.655 21.16 < 0.001 0.345
    Night Wakings
        Controla 3.51 (2.82) 2.43 (2.04) 2.20 (1.94) 0.792 10.77 < 0.001 0.208
        Interneta,c 3.72 (2.87) 2.87 (2.33) 2.29 (2.67) 0.764 14.54 < 0.001 0.236
        Internet & Routinea 3.14 (2.19) 2.10 (2.02) 1.79 (1.71) 0.781 11.52 < 0.001 0.219
    Time Awake Night
        Control 18.59 (13.60) 19.30 (13.63) 20.39 (29.99) 0.994 0.19 0.825 0.006
        Interneta 24.75 (18.36) 18.03 (13.08) 17.65 (15.69) 0.846 6.63 0.002 0.154
        Internet & Routinea 23.93 (23.75) 15.31 (10.65) 17.61 (21.81) 0.807 7.07 0.002 0.193
    Sleep Efficiency
        Control 88.98 (13.26) 89.60 (12.52) 90.36 (9.99) 0.989 0.43 0.652 0.011
        Internetb,c 84.98 (12.79) 87.21 (9.70) 90.51 (10.67) 0.801 11.67 < 0.001 0.199
        Internet & Routineb,c 87.47 (10.75) 90.23 (8.46) 93.80 (10.82) 0.722 15.77 < 0.001 0.278
    Global Sleep Quality
        Controla,c 8.62 (2.29) 7.90 (1.38) 7.23 (2.49) 0.733 14.92 < 0.001 0.267
        Interneta,c 9.23 (2.46) 7.55 (2.20) 6.49 (2.06) 0.489 49.15 < 0.001 0.511
        Internet & Routinea,c 9.10 (2.19) 7.07 (2.10) 6.05 (2.22) 0.384 65.84 < 0.001 0.616

A one way repeated measures ANOVA was utilized to analyze group differences over time. ^Lower scores are better.

a

Significant difference between baseline/week 2 and baseline/week 3.

b

Significant difference between baseline and week 3.

c

Significant difference between week 2 and week 3.

Significant interaction. WL, Wilks lambda; ES, Effect size as partial Eta2 where 0.10 = small effect, 0.25 = moderate effect, and 0.40 = large.