Table 7.
Subgroup treatment effect interactions
| Interaction term | Coefficient* (SE) | 95% CI | P value |
|---|---|---|---|
| Diet × age | 0.085 (0.11) | −0.13 to 0.30 | 0.448 |
| Exercise × age | −0.002 (0.11) | −0.22 to 0.22 | 0.986 |
| Diet × BMI | −0.032 (0.11) | −0.24 to 0.18 | 0.762 |
| Exercise × BMI | −0.206 (0.11) | −0.42 to 0.01 | 0.061 |
| Diet × pain | 0.081 (0.13) | −0.17 to 0.33 | 0.518 |
| Exercise × pain | −0.042 (0.11) | −0.27 to 0.18 | 0.716 |
| Diet × KL | −0.052 (0.11) | −0.27 to 0.17 | 0.639 |
| Exercise × KL | −0.097 (0.12) | −0.34 to 0.15 | 0.432 |
BMI=body mass index, KL=Kellgren-Lawrence osteoarthritis score.
*Analyses included age band, sex, BMI category, and outcome of interest as covariates plus indicators for each intervention.