Table 3.
Multivariable-adjusted associations between social class and sedentary time in children
| Social class of head of household | Model 1* coefficient† | Model 2* coefficient† | Model 3* coefficient† |
|---|---|---|---|
| (95% CI) | (95% CI) | (95% CI) | |
| Accelerometer sedentary time (min/day) (N=587) | |||
| Unskilled and semiskilled manual (reference) | |||
| Skilled manual | −12.2 (−26.37 to 1.97) | −12.85 (−27.29 to 1.58) | −9.92 (−21.93 to 2.08) |
| Skilled non-manual | 9.97 (−7.79 to 27.75) | 6.89 (−11.13 to 24.93) | 2.3 (−11.51 to 16.12) |
| Managerial technical and professional | 16.22 (4.13 to 28.31) | 6.4 (−6.6 to 19.42) | 2.19 (−9.28 to 13.66) |
| Trend p | 0.000 | 0.020 | 0.082 |
| TV time (min/day) (N=3822) | |||
| Unskilled and semiskilled manual (reference) | |||
| Skilled manual | −5.29 (−15.7 to 5.1) | −4.98 (−15.7 to 5.72) | −4.63 (−15.27 to 6) |
| Skilled non-manual | −6.28 (−16.89 to 4.32) | −5.95 (−16.72 to 4.81) | −5.25 (−16 to 5.49) |
| Managerial technical and professional | −15.69 (−24.18 to −7.2) | −14.17 (−24.11 to −4.23) | −14.46 (−24.32 to −4.6) |
| Trend p | 0.000 | 0.005 | 0.004 |
| Non-TV sitting time (min/day) (N=3820) | |||
| Unskilled and semiskilled manual (reference) | |||
| Skilled manual | −4.2 (−12.86 to 4.45) | −7.41 (−16.67 to 1.84) | −6.81 (−16.07 to 2.44) |
| Skilled non-manual | 10.82 (1 to 20.65) | 8.67 (−1.37 to 18.72) | 9.44 (−0.56 to 19.44) |
| Managerial technical and professional | 5.8 (−2.08 to 13.69) | −1.82 (−11.17 to 7.53) | −1.94 (−11.18 to 7.29) |
| Trend p value | 0.021 | 0.430 | 0.468 |
*Model 1: adjusted for age and sex; model 2: further adjustments for body mass index, limiting long-standing illness, household income and area deprivation; model 3: further adjustments for time spent in active transportation to and from school, time spent in sporting or informal activities and moderate-to-vigorous physical activity time (accelerometer models only). Models with accelerometer sedentary time as the outcome were also adjusted for average accelerometer wear time on valid days.
†Generalised linear model coefficients; coefficients indicate mean differences (in social class) between the reference category (non-manual) and manual category; for example, a value of five indicates that the manual category had an average daily sedentary time that is 5 min higher than the referent group.