Research Article
Motivation for Participating in a Weight Loss Program and Financial Incentives: An Analysis from a Randomized Trial
Table 4
Changes in controlled motivation.
| Assessments | All participants | 3-Month weight losers | 6-Month weight losers | BL, 3, 6, 12 | 3, 6 | 6, 12 |
| Fixed effects | Coefficient | S.E. | Coefficient | S.E. | Coefficient | S.E. | Intercept | 2.26*** | 0.09 | 2.42*** | 0.16 | 2.24*** | 0.18 | Month | −0.01 | 0.01 | 0.06 | 0.03 | −0.00 | 0.02 | Intervention | 0.00 | 0.08 | −0.15 | 0.13 | −0.01 | 0.14 | Intervention by month | −0.01 | 0.01 | −0.06 | 0.05 | 0.03 | 0.02 | Weight change | −0.02* | 0.01 | −0.01 | 0.02 | −0.01 | 0.01 | (negative values represent losses) | | | | | | | Female | −0.02 | 0.10 | −0.08 | 0.17 | 0.04 | 0.19 | (reference: male) | | | | | | | Random Effect (variance component) | | | | | | | Intercept | 0.52*** | 0.05 | 0.60*** | 0.09 | 0.72*** | 0.09 | Residual | 0.57*** | 0.03 | 0.47*** | 0.05 | 0.33*** | 0.04 | Goodness of fit | | | | | | | −2LL | 4153.3 | | 1018.1 | | 938.0 | | AIC | 4169.3 | | 1034.1 | | 954.0 | | BIC | 4204.0 | | 1061.4 | | 981.3 | | Number of observations | 1529 | | 370 | | 359 | | Number of subjects | 566 | | 222 | | 222 | |
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