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Table 4 Longitudinal associations between sedentary behaviour, physical activity and bone stiffness index percentiles after 2 years

From: Cross-sectional and longitudinal associations between physical activity, sedentary behaviour and bone stiffness index across weight status in European children and adolescents

 

Whole group

Thin/normal weight group

Overweight/obese group

β (99%CI)

p-value

β (99%CI)

p-value

β (99%CI)

p-value

Main sample (self-reported data,, N = 1653)

 Baseline watching TV/video/DVD (hours/week)

0.06(− 0.33,0.44)

0.712

0.28(− 0.18,0.74)

0.118

− 0.63(− 1.34,0.07)

0.021

 Baseline playing computer/games (hours/week)

0.02(− 0.57,0.60)

0.943

− 0.12(− 0.81,0.57)

0.651

0.42(− 0.67,1.50)

0.318

 Baseline sports clubs (hours/week)

1.07(− 0.23,2.36)

0.034

0.96(− 0.54,2.46)

0.098

1.03(− 1.54,3.60)

0.299

 Change of watching TV/video/DVD (hours/week)

0.11(− 0.28,0.49)

0.468

0.36(−0.10,0.81)

0.042

−0.63(−1.35,0.08)

0.022

 Change of playing computer/games (hours/week)

0.09(−0.35,0.54)

0.593

0.09(− 0.47,0.64)

0.688

0.32(− 0.41,1.04)

0.258

 Change of sports clubs (hours/week)

1.28 (0.30,2.26)

0.001

1.29 (0.10,2.48)

0.005

1.04(−0.63,2.70)

0.110

 Weight bearing sports

 Moderate or high mechanical loads vs. No or low mechanical loads (reference)

−0.69(−4.99,3.61)

0.678

0.32(− 4.76,5.41)

0.870

−3.13(−11.14,4.89)

0.313

Subsample (accelerometer data, N = 839)

 Baseline sedentary time (hours/day)

0.60(−1.77,2.96)

0.516

0.99(−1.86,3.85)

0.369

−0.39(−4.65,3.86)

0.811

 Baseline light physical activity (hours/day)

−0.81(−3.50,1.89)

0.439

−1.60(−4.93,1.73)

0.214

0.16(−4.46,4.78)

0.927

 Baseline moderate-to-vigorous physical activity (10 min/day)

2.77 (1.50,4.05)

< 0.001

2.97 (1.53,4.42)

< 0.001

2.85(−0.12,5.81)

0.013

 Change of sedentary time (hours/day)

−0.85(−2.58,0.88)

0.205

−1.19(−3.25,0.87)

0.135

0.10(−3.09,3.29)

0.935

 Change of light physical activity (hours/day)

−0.94(−3.03,1.16)

0.249

−1.45(−3.99,1.09)

0.140

0.42(−3.26,4.10)

0.768

 Change of moderate-to-vigorous physical activity (10 min/day)

1.05(−0.09,2.18)

0.018

0.89(−0.39,2.16)

0.073

1.76(−0.88,4.40)

0.084

  1. Adjusted for baseline age, sex, socio-economic status, daylight, bone stiffness index percentiles, height and weight z-scores, country as a random effect