Table 4

Change in anthropometry, Actical and sleep measures between baseline and 20 weeks
n Baseline 20 weeks Δ Mean P value
Mean (SD) Mean (SD) (95% CI)
Anthropometric Measures
Weight (kg) 33 55.8 (16.1) 57.4 (15.8) 1.61 (−1.02 to 2.21) <0.001
Height (m) 33 1.59 (0.13) 1.62 (0.12) 0.03 (0.02 to 0.03) <0.001
Height z-score 33 0.50 (1.06) 0.56 (1.02) 0.06 (−0.03 to 0.15) 0.158
BMI (kg/m2) 33 21.7 (4.50) 21.7 (4.49) −0.06 (−0.28 to 0.16) 0.607
BMI z-score 33 0.79 (1.18) 0.66 (1.19) −0.13 (−0.20 to 0.05) 0.001
Waist Circumference (cm) 32 78.9 (11.8) 78.3 (15.5) −0.64 (−3.55 to 2.28) 0.659
Sleep Questionnaires
ASHS (Sleep Hygiene) 32 4.70 (0.41) 4.95 (0.31) 0.19 (0.06 to 0.33) 0.005
PSQI (Self report sleep quality) 33 7.47 (2.43) 4.47 (2.37) −2.93 (−3.61 to −2.24) <0.001
SDSC (Parent report sleep quality) 32 53.4 (9.0) 39.2 (9.2) −14.1 (−17.1 to −11.1) <0.001
PDSS (Daytime sleepiness) 33 16.5 (6.0) 11.3 (6.0) −5.1 (−7.0 to −3.2) <0.001
Actical® measures
Sleep Duration (minutes) 32 552 (58) 557 (63) −1 (−19 to 16) 0.906
Sleep total eea 32 18.5 (54.8) 5.5 (6.3) −11.9 (−25.7 to 1.9) 0.090
Day total ee 32 568 (224) 533 (263) −38 (−119 to 43) 0.356
Day sedentary/light ee 32 238 (90) 214 (80) −27 (−50 to −3) 0.025
Day moderate/vigorous ee 32 330 (152) 319 (206) −12 (−80 to 57) 0.740

aEnergy expenditure in kilocalories.

Means shown are unadjusted. Baseline data represent the mean of the two pre-intervention measures for sleep questionnaires and Actical data, and the one pre-intervention measure for anthropometry. Changes in means and p-values were determined from paired t-tests for anthropometric and Actical measures and using regression for sleep measures. For sleep measures, changes are determined as the change in the slope of the regression curves over 20 weeks.

Tan et al.

Tan et al. BMC Pediatrics 2012 12:189   doi:10.1186/1471-2431-12-189

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