Table 2.
Mixed effects estimates on physical activity (PA) levels (MET-hrs/wk) among Chinese children, coefficient (95% CI)
| PA | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Age | 6.12(5.28,6.96) | 6.21(5.36,7.07) | 5.6(4.72,6.49) | 5.75(4.84,6.65) |
| Survey year (ref: 2004) | ||||
| 2006 | 0.40(−13.74,14.55) | −1.05(−15.42,13.31) | −3.31(−18.61,11.99) | −5.18(−20.7,10.34) |
| 2009 | 12.98(−2.78,28.74) | 12.64(−3.25,28.54) | 10.15(−6.39,26.69) | 9.97(−6.70,26.64) |
| 2011 | −23.6(−9.14,-38.07) | −17.73(−1.77,-33.69) | −20.2(−5.28,-35.13) | 14.56(−1.95,31.06) |
| 2006*Age | −0.10(−1.26,1.07) | −0.08(−1.25,1.1) | 0.41(−0.84,1.66) | 0.40(−0.86,1.66) |
| 2009*Age | −1.04(−2.37,0.29) | −1.01(−2.35,0.34) | −0.60(−1.98,0.79) | −0.65(−2.05,0.76) |
| 2011*Age | −1.91(−3.15,-0.68) | −1.20(−2.55,0.15) | −1.31(−2.57,-0.05) | −0.96(−2.04,-0.73) |
| Gender | −6.38(−9.85,-2.9) | −5.86(−9.52,-2.2) | −6.24(−9.73,-2.75) | −5.74(−9.42,-2.06) |
| Inverse Mill’s Ratio | 3.99(−1.51,9.48) | 5.80(0.06,11.53) | ||
| Community Urbanicity | −0.15(−0.24,-0.05) | −0.07(−0.18,-0.03) | ||
| Bicycle ownership | 2.07(−1.24,5.37) | 2.34(−1.12,5.79) | ||
| Vehicle ownership | 0.71(−2.58,4.01) | 0.06(−3.42,3.53) | ||
| No of Computers | −4.80(−9.03,-0.57) | −4.74(−9.43,-0.05) | ||
| No of Household members | 0.71(−0.57,1.99) | 0.41(−0.95,1.77) | ||
| Overweight/Obese | 0.61(−3.91,5.14) | 2.88(−1.97,7.72) | ||
| Household income | 0.60(−1.68,2.89) | 0.65(−1.79,3.08) | ||
| Number of observations | 5697 | 5319 | 4532 | 4177 |
| Number of individuals | 3528 | 3162 | 3022 | 2676 |
Notes: Data from CHNS 2004–2011; bold values denote statistical significance at p < 0.05