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Table 2 Relationship between TV watching and body composition variables a

From: Sizing the association between lifestyle behaviours and fatness in a large, heterogeneous sample of youth of multiple ethnicities from 4 countries

   New Zealand Fiji Tonga Australia All
  Hours per day Pacific (N = 830) Maori (N = 370) Asian (N = 138) European (N = 239) All New Zealand (N = 1577) Indigenous Fijian (N = 600) Fijian Indian (N = 781) All Fiji (N = 1381) Tongan (N = 1019) Australian (N = 1673) All (N = 5650)d
Mean BMIb <1 24.99 (0.17) 23.96 (0.50) 19.68 (0.43) 21.04 (0.39) 23.68 (0.24) 21.68 (0.23) 18.94 (0.20) 20.13 (0.16) 22.26 (0.15) 20.62 (0.07) 21.64 (0.08)
Increment in BMIc 1-2 0.06 (0.45) 0.23 (0.52) 1.21 (0.42) 0.52 (0.13) 0.31 (0.26) -0.13 (0.28) -0.12 (0.18) -0.13 (0.18) 0.23 (0.19) 0.21 (0.14) 0.16 (0.09)
>2 0.33 (0.29) -0.00 (0.51) 0.69 (0.34)* 1.18 (0.29) 0.41 (0.26) -0.00 (0.29) -0.12 (0.21) -0.08 (0.18) 0.43 (0.21)* 0.15 (0.10) 0.23 (0.09)*
Mean BMIzb <1 1.35 (0.04) 1.09 (0.11) -0.26 (0.15) 0.21 (0.10) 0.97 (0.06) 0.42 (0.07) -0.63 (0.08) -0.18 (0.05) 0.68 (0.04) 0.28 (0.03) 0.43 (0.02)
Increment in BMIzc 1-2 0.01 (0.01) 0.02 (0.10) 0.39 (0.12) 0.16 (0.06) 0.07 (0.06) -0.04 (0.08) -0.07 (0.07) -0.06 (0.06) 0.06 (0.05) 0.04 (0.04) 0.03 (0.03)
>2 0.06 (0.06) -0.03 (0.12) 0.27 (0.11)* 0.31 (0.08) 0.09 (0.06) -0.02 (0.08) -0.06 (0.08) -0.04 (0.06) 0.09 (0.05) 0.02 (0.03) 0.05 (0.03)
Mean %BFb <1 29.82 (0.52) 28.92 (1.44) 18.89 (1.35) 23.09 (1.15) 27.63 (0.52) 20.50 (0.62) 22.63 (0.60) 21.71 (0.43) 22.08 (0.60) 26.07 (0.36) 24.67 (0.23)
Increment in %BFc 1-2 0.88 (1.22) 1.55 (1.47) 3.85 (2.51) 1.48 (1.68) 1.46 (0.77) -0.40 (0.70) -0.45 (0.65) -0.45 (0.54) 0.54 (0.64) 0.11 (0.44) 0.43 (0.33)
>2 0.80 (0.73) 0.37 (1.59) 3.20 (1.32)* 3.43 (0.88) 1.28 (0.46)* 0.19 (0.67) -0.63 (0.56) -0.30 (0.44) 1.61 (0.53) 0.37 (0.38) 0.77 (0.24)
Mean TFMb <1 22.35 (0.67) 20.95 (1.61) 9.98 (0.97) 14.26 (1.03) 19.69 (0.60) 12.27 (0.47) 11.27 (0.45) 11.72 (0.33) 13.69 (0.46) 14.76 (0.22) 15.19 (0.20)
Increment in TFMc 1-2 0.64 (1.66) 1.33 (1.85) 3.33 (1.79) 1.25 (0.68) 1.21 (0.84) -0.19 (0.58) -0.20 (0.43) -0.25 (0.43) 0.50 (0.48) 0.49 (0.36) 0.50 (0.28)
>2 0.98 (1.09) 0.36 (1.63) 2.28 (0.94)* 3.15 (0.83) 1.27 (0.54) 0.32 (0.61) -0.31 (0.43) -0.08 (0.34) 1.44 (0.55)* 0.47 (0.28) 0.75 (0.21)
  1. aAdjusted for age and sex. “New Zealand All”, “Fiji All” and “All countries” were further adjusted for ethnicity; bStandard error in parentheses; cCompared to “<1 hour per day” (reference category). Standard error in parentheses; dR2 for BMI, BMIz, %BF and TFM models = 0.315, 0.311, 0.243 and 0.227, respectively; BMI = Body mass index (kg/m2); BMIz = BMI z-score; %BF = Percent body fat (%); TFM = Total fat mass (kg); *P<0.05; P < 0.01; P < 0.001.