Table 3.
Multivariable models of associations between Dietary Guideline Index score and BMI over 5 years (2007/08–2012/13) in the Resilience for Eating and Activity Despite Inequality (READI) cohort (n = 1242 participants)a
| Fixed effects models with robust standard errors |
Mixed models with random intercept and slope |
|||
|---|---|---|---|---|
| No interaction | With interaction | No interaction | With interaction | |
| Variable | Coefficient (95% CI) | Coefficient (95% CI) | Coefficient (95% CI) | Coefficient (95% CI) |
| Age | 0.142* (0.111, 0.173) | 0.142* (0.111, 0.173) | 0.128* (0.099, 0.156) | 0.128* (0.10, 0.156) |
| DGI score | −0.015* (−0.022, -0.008) | −0.014* (−0.021, -0.007) | −0.013* (−0.020, -0.006) | −0.012 (−0.019, -0.005) |
| Age*DGI score | – | −0.0007 (−0.0015, 0.0001) | – | −0.0008 (−0.0016, 0.0001) |
| SD of random intercept | 5.48 | 5.48 | ||
| SD of random slope | 0.16 | 0.16 | ||
| SD of residual | 1.55 | 1.55 | ||
| Covariance | 0.27 | 0.28 | ||
aAll models adjusted for the following time-varying confounders: age (mean centred), smoking status, menopausal status, educational level, marital status, number of births, physical activity. Urban/rural location of residence at baseline was included as a time-invariant confounder in the mixed model only.
*P < 0.0001; P = 0.001.