Table 3.
Mixed effects estimates on work and domestic PA levels (MET-hrs/wk) among Chinese adult women, coefficient (95 % CI)
| Women | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Age | 11.52 (10.25,12.79) | 7.51 (6.06,8.96) | 13.07 (11.7,14.45) | 7.26 (5.67,8.84) |
| Age- squared | −0.16 (−0.18,−0.15) | −0.11 (−0.13,−0.1) | −0.17 (−0.18,−0.15) | −0.1 (−0.12,−0.08) |
| Survey year (ref: 1991) | ||||
| 1993 | −191.08 (−215.13,−167.03) | −174.74 (−201.52,−147.96) | −161.92 (−189.94,−133.89) | −154.8 (−183.4,−126.19) |
| 1997 | −247.85 (−274.67,−221.04) | −231.38 (−262.37,−200.4) | −190.69 (−221.93,−159.45) | −194.79 (−227.93,−161.64) |
| 2000 | −306.59 (−333.95,−279.24) | −241.57 (−274.56,−208.57) | −183.96 (−215.54,−152.38) | −187.61 (−222.63,−152.6) |
| 2004 | −356.11 (−389.18,−323.03) | −172.42 (−212.01,−132.83) | −176.80 (−215.67,−137.92) | −117.34 (−159.23,−75.45) |
| 2006 | −352.57 (−386.89,−318.26) | −172.04 (−211.6,−132.49) | −141.05 (−181.73,−100.38) | −112.65 (−155.36,−69.94) |
| 2009 | −386.64 (−420.80,−352.48) | −190.23 (−228.17,−152.29) | −186.09 (−225.02,−147.16) | −140.05 (−180.76,−99.33) |
| 2011 | −401.56 (−438.85,−364.26) | −184.7 (−225.63,−143.76) | −188.98 (−231.32,−146.64) | −147.06 (−190.87,−103.25) |
| 1993*Age | 0.57 (0.06,1.08) | 0.55 (−0.05,1.14) | 0.71 (0.07,1.34) | 0.37 (−0.28,1.03) |
| 1997*Age | 1.36 (0.78,1.93) | 1.88 (1.18,2.57) | 1.61 (0.91,2.32) | 1.41 (0.66,2.16) |
| 2000*Age | 1.40 (0.82,1.98) | 1.11 (0.38,1.84) | 0.95 (0.25,1.65) | 0.54 (−0.24,1.32) |
| 2004*Age | 0.99 (0.32,1.66) | −0.72 (−1.58,0.14) | −0.32 (−1.14,0.50) | −1.29 (−2.2,−0.38) |
| 2006*Age | 1.04 (0.34,1.73) | −0.57 (−1.42,0.27) | −0.48 (−1.32,0.37) | −1.01 (−1.93,−0.1) |
| 2009*Age | 1.86 (1.17,2.55) | 0.08 (−0.71,0.88) | 0.83 (0.03,1.62) | −0.37 (−1.23,0.48) |
| 2011*Age | 1.81 (1.08,2.54) | −0.41 (−1.24,0.43) | 0.74 (−0.10,1.59) | −0.62 (−1.52,0.27) |
| Inverse Mill’s Ratio | −7.76 (−8.44,−7.08) | −5.88 (−6.54,−5.21) | −5.77 (−6.48,−5.05) | −5.14 (−5.82,−4.46) |
| Household income | 0.00 (0.00,0.00) | 0.00 (0.00,0.00) | ||
| Bicycle ownership | 2.94 (−3.41,9.30) | 2.69 (−3.74,9.11) | ||
| Vehicle ownership | −12.32 (−18.77,−5.87) | −7.32 (−13.91,−0.72) | ||
| TV and computer ownership | −40.41 (−49.68,−31.13) | −20.89 (−30.17,−11.61) | ||
| Household size | 6.77 (4.84,8.70) | −0.73 (−2.72,1.26) | ||
| Community Urbanicity | −5.23 (−5.42,−5.04) | −1.94 (−2.18,−1.71) | ||
| Overweight/Obese | −5.28 (−12.07,1.52) | −3.04 (−10.02,3.94) | ||
| Occupation (ref: professional job) | ||||
| Farmer | 323.73 (313.07,334.39) | 295.27 (283.14,307.39) | ||
| officer/soldier/athlete | 84.26 (37.41,131.12) | 80.93 (29.79,132.08) | ||
| Unskilled worker | 205.69 (193.04,218.34) | 199.06 (186.15,211.97) | ||
| Skilled worker | 73.93 (62.91,84.94) | 72.75 (61.53,83.97) | ||
| Other occupation | 50.52 (35.01,66.02) | 46.78 (30.14,63.42) | ||
| Married | 1.67 (−3.29,6.63) | 4.56 (−0.68,9.79) | ||
| Number of children | 10.69 (8.02,13.36) | 8.4 (5.62,11.19) | ||
| Education (ref: < primary school) | ||||
| middle and high school | −27.5 (−34.83,−20.17) | −16.55 (−24.07,−9.02) | ||
| college and above | −40.66 (−58.51,−22.82) | −21.52 (−39.73,−3.31) | ||
| Number of observations | 29564 | 19654 | 23617 | 18295 |
| Number of individuals | 7293 | 6308 | 6684 | 6054 |
Notes: Data from CHNS 1991–2011; bold values denote statistical significance at p < 0.05
Model 1 included age and age-squared, indicator variables representing survey year, and age and age-squared interacted with survey year
Model 2 layers on individual level covariates (occupation, weight status, marital status, education and including number of kids for female to model 1
Model 3 layers on household socio-economic measures such as household income, household size, household ownership and urbanization index to model 1
Model 4 includes the full set of variables