Table 4 Predictive relationships between sleep and activity components at 1, 2 and 3.5 years of age, and BMI z-score at 5 yearsa
Age (years) | Mean BMI z-score (SD) at 5 years of age | Component | Regression coefficientb (SE) | p-value | 10% relative difference in minutes | Estimated difference (95% CI) in BMI z-score with a 10% increase in component | Estimated difference (95% CI) in BMI z-score with a 10% decrease in component |
|---|---|---|---|---|---|---|---|
1 (n = 292) | 0.43 (0.83) | Sleepc | − 0.24 (0.24) | 0.336 | 71 | −0.038 (− 0.119, 0.043) | 0.038 (− 0.043, 0.119) |
|  |  | Sedentaryd | 0.28 (0.25) | 0.266 | 56 | 0.024 (−0.042, 0.089) | −0.024 (− 0.092, 0.043) |
|  |  | LPA | −0.08 (0.12) | 0.510 | 18 | 0.002 (−0.017, 0.021) | −0.002 (− 0.023, 0.019) |
|  |  | MVPA | 0.03 (0.03) | 0.312 | 0.1 | 0.003 (−0.003, 0.008) | −0.003 (− 0.009, 0.003) |
2 (n = 190) | 0.43 (0.89) | Sleep | − 0.43 (0.28) | 0.126 | 69 | −0.071 (− 0.162, 0.020) | 0.072 (− 0.020, 0.164) |
|  |  | Sedentary | 0.45 (0.26) | 0.082 | 46 | 0.056 (−0.007, 0.120) | −0.059 (− 0.126, 0.007) |
|  |  | LPA | −0.05 (0.24) | 0.817 | 28 | −0.006 (− 0.054, 0.042) | 0.006 (− 0.046, 0.058) |
|  |  | MVPA | 0.03 (0.06) | 0.559 | 0.6 | 0.003 (−0.007, 0.012) | − 0.003 (− 0.013, 0.007) |
3.5 (n = 212) | 0.44 (0.84) | Sleep | −0.08 (0.30) | 0.784 | 65 | −0.013 (− 0.107, 0.081) | 0.013 (− 0.082, 0.108) |
|  |  | Sedentary | −0.24 (0.25) | 0.326 | 47 | −0.031 (− 0.091, 0.030) | 0.032 (− 0.032, 0.096) |
|  |  | LPA | 0.23 (0.17) | 0.183 | 29 | 0.024 (−0.011, 0.060) | −0.026 (− 0.065, 0.012) |
|  |  | MVPA | 0.09 (0.07) | 0.182 | 2 | 0.008 (− 0.004, 0.019) | −0.009 (− 0.021, 0.004) |