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

^∗Significant at 𝑃<.05; **significant at 𝑃<.01; ***significant at 𝑃<.001.