Table 2.
Multivariable-adjusted associations between equivalised household income and sedentary time in children
| Household income quintiles | Model 1* coefficient† | Model 2* coefficient† | Model 3* coefficient† |
|---|---|---|---|
| (95% CI) | (95% CI) | (95% CI) | |
| Accelerometer sedentary time (min/day) (N=587) | |||
| <£10 671 (reference) | |||
| £10 671–£17 788 | −11.64 (−27.17 to 3.88) | −12.33 (−27.81 to 3.13) | −8.76 (−21.6 to 4.07) |
| £17 789–£27 316 | −0.19 (−14.38 to 13.99) | −3.05 (−18 to 11.88) | −7.78 (−21.05 to 5.49) |
| £27 317–£44 199 | 15.82 (1.12 to 30.53) | 8.49 (−8.19 to 25.18) | 7.31 (−7.25 to 21.88) |
| >£44 199 | 15.02 (−1.77 to 31.82) | 1.2 (−16.94 to 19.35) | −1.3 (−16.2 to 13.59) |
| Trend p | 0.001 | 0.382 | 0.592 |
| TV time (min/day) (N=3822) | |||
| <£10 671 (reference) | |||
| £10 671–£17 788 | −9.65 (−19.86 to 0.56) | −7.98 (−18.17 to 2.19) | −8.3 (−18.4 to 1.78) |
| £17 789–£27 316 | −10.87 (−20.84 to −0.9) | −7.75 (−18.56 to 3.06) | −9.17 (−19.87 to 1.53) |
| £27 317–£44 199 | −10.51 (−20.58 to −0.44) | −4.06 (−15.55 to 7.42) | −5.92 (−17.29 to 5.44) |
| >£44 199 | −21.51 (−31.34 to −11.69) | −14.38 (−26.27 to −2.49) | −17.13 (−29.14 to −5.12) |
| Trend p | 0.001 | 0.069 | 0.020 |
| Non-TV sitting time (min/day) (N=3820) | |||
| <£10 671 (reference) | |||
| £10 671–£17 788 | 4.47 (−4.22 to 13.16) | 5.08 (−3.57 to 13.73) | 4.57 (−4.01 to 13.16) |
| £17 789–£27 316 | 11.45 (2.1 to 20.79) | 11.65 (1.71 to 21.58) | 9.86 (0 to 19.72) |
| £27 317–£44 199 | 13.32 (4.39 to 22.25) | 12.37 (2.59 to 22.15) | 10.18 (0.43 to 19.92) |
| >£44 199 | 10.08 (0.79 to 19.36) | 9.32 (−1.32 to 19.98) | 6.03 (−4.73 to 16.79) |
| Trend p | 0.004 | 0.128 | 0.375 |
*Model 1: adjusted for age and sex; model 2: further adjustments for body mass index, limiting long-term illness, social class 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. 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 daily sedentary time) between the reference category (>£39 000) and each of the other household income quartiles, for example,a value of five indicates that a specific category had an average daily sedentary time that is 5 min higher than the referent group.