Longitudinal associations between TV viewing and BMI not explained by the ‘mindless eating’ or ‘physical activity displacement’ hypotheses among adults

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
Change in daily TV viewing	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

ISSN: 1471-2458