TABLE 6.
Bootstrap mediation results: LOCF analysis from Baseline to Week 72.
| Model | Mediator | Path | Estimate | SE | CI |
|---|---|---|---|---|---|
| 3 | Unbouted | IWS ‐> unbouted moderate physical activity (a) | −0.14 | 0.53 | −1.21, 0.89 |
| Moderate physical activity | Unbouted moderate physical activity ‐> percent weight change (b) | −0.03 | 0.02 | −0.07, −0.001 | |
| Direct effect of IWS ‐> percent weight change (c’) | 0.20 | 0.12 | −0.02, 0.45 | ||
| Total effect of IWS ‐> percent weight change (c) | 0.19 | 0.11 | 0.07, −0.02 | ||
| Indirect effect (a × b) | 0.00 | 0.02 | −0.03, 0.04 | ||
| Bouted MVPA | IWS ‐> bouted MVPA (a) | 0.01 | 0.01 | −0.01, 0.03 | |
| Bouted MVPA ‐> percent weight change (b) | −1.13 | 1.23 | −3.61, 1.18 | ||
| Direct effect of IWS ‐> percent weight change (c’) | 0.21 | 0.12 | 0.01, 0.47 | ||
| Total effect of IWS ‐> percent weight change (c) | 0.20 | 0.11 | 0.08, −0.02 | ||
| Indirect effect (a × b) | −0.01 | 0.02 | −0.07, 0.01 | ||
| Energy | IWS ‐> energy expenditure (a) | 7.51 | 12.84 | −19.07, 32.31 | |
| Expenditure | Energy expenditure ‐> percent weight change (b) | 0.00 | 0.00 | 0.00, 0.00 | |
| Direct effect of IWS ‐> percent weight change (c’) | 0.18 | 0.11 | −0.01, 0.42 | ||
| Total effect of IWS ‐> percent weight change (c) | 0.18 | 0.11 | 0.10, −0.03 | ||
| Indirect effect (a × b) | 0.00 | 0.01 | −0.04, 0.02 | ||
| 4 | Unbouted | IWS ‐> unbouted moderate physical activity (a) | −0.14 | 0.54 | −1.27, 0.86 |
| Moderate physical activity | Unbouted moderate physical activity ‐> odds of ≥5% weight loss (b) | 0.01 | 0.01 | 0.00, 0.02 | |
| Direct effect of IWS ‐> odds of ≥5% weight loss (c’) | −0.05 | 0.04 | −0.13, 0.01 | ||
| Indirect effect (a × b) | 0.00 | 0.01 | −0.02, 0.01 | ||
| Bouted MVPA | IWS ‐> bouted MVPA (a) | 0.01 | 0.01 | −0.01, 0.03 | |
| Bouted MVPA ‐> odds of ≥5% weight loss (b) | 0.51 | 0.38 | −0.16, 1.29 | ||
| Direct effect of IWS ‐> odds of ≥5% weight loss (c’) | −0.05 | 0.04 | −0.13, 0.01 | ||
| Indirect effect (a × b) | 0.00 | 0.01 | −0.01, 0.02 | ||
| Energy | IWS ‐> energy expenditure (a) | 7.51 | 12.87 | −19.03, 32.58 | |
| Expenditure | Energy expenditure ‐> odds of ≥5% weight loss (b) | 0.00 | 0.00 | 0.00, 0.00 | |
| Direct effect of IWS ‐> odds of ≥5% weight loss (c’) | −0.05 | 0.04 | −0.14, 0.00 | ||
| Indirect effect (a × b) | 0.00 | 0.00 | −0.01, 0.01 |
Note: Predictor: change in IWS from baseline to week 20; Mediator: change in physical activity from week 20 to 72; Outcome: percent weight loss (Model 3) or odds of ≥5% weight loss (Model 4) from baseline to week 72. This table contains unstandardised coefficients, Confidence intervals that do not contain zero indicate a significant model and are highlighted in bold.
Abbreviations: IWS, internalized weight stigma; MVPA, moderate‐to‐vigorous physical activity; WSSQ, Weight Self‐Stigma Questionnaire.