Table 4.
Association1 between change in television viewing from baseline to follow-up and BMI (n = 1068) (Pathway 3)
| Change in daily TV viewing | BMI at CDAH-2 adjusted for BMI at CDAH-1 | |
|---|---|---|
| Unweighted sample β (95% CI) |
Weighted sample2 β (95% CI) |
|
| Change in TV viewing (hrs/day) | 0.08 (− 0.01, 0.18) | 0.09 (− 0.04, 0.22) |
| Categories of change in TV viewing | ||
| Stable | ||
| > 1 h increase | 0.41 (0.03, 0.78)3 | 0.38 (− 0.18, 0.94) |
| > 1 h decrease | −0.02 (− 0.40, 0.35) | 0.04 (− 0.46, 0.53) |
1Adjusted for age, sex, education
2Inverse probability weights were created from the comprehensive data collected over three time points. Observations that were missing were imputed using multiple imputation by chained equations so that a complete set of weights for the analysis sample was available; we imputed 50 different datasets, and for each dataset a set of weights was derived and applied to the analysis model. The final estimate is the average of these model estimates, along with confidence intervals derived using Rubin’s rules (26)
3Significantly different from reference category in linear regression analyses
CDAH1 Childhood Determinants of Adult Health study (2004–06); CDAH2 Childhood Determinants of Adult Health study (2009–10); TV television