Table 3.

Total, direct, and indirect effects of Reward-based Eating Drive (RED) scale and Perceived Stress Scale (PSS) on weight at 12-month and 18-month assessments.

Weight (kg)	Effect	β	SE(β)	95% CI Lower	95% CI Upper	p
12 months (n=158)	Total	−0.13	0.08	−0.28	0.01	.077
	Direct	−0.08	0.07	−0.22	0.07	.308
	Indirect: PSS	0.01	0.01	−0.02	0.03	.608
	Indirect: RED	−0.06	0.03	−0.12	−0.01	.030
18 months (n=159)	Total	−0.09	0.09	−0.27	0.08	.296
	Direct	−0.07	0.09	−0.25	0.11	.472
	Indirect: PSS	−0.01	0.01	−0.03	0.02	.624
	Indirect: RED	−0.02	0.03	−0.07	0.03	.396

Note. Total effects represent the effects of intervention arm on weight (kg) at 12 and 18 months when including weight assessed at baseline in the model. Direct effects represent the effects of intervention arm on weight at 12 and 18 months after including weight assessed at baseline and both the Perceived Stress Scale (PSS) and Reward-based Eating Drive (RED) scale assessed at baseline and 6 months, in the model. Indirect effects represent the effects of PSS and RED assessed at 6 months on weight at 12 and 18 months after including baseline values of weight, PSS, and RED in the model. When testing PSS and RED within independent mediation models predicting weight at 12 months, the pattern and significance of results for RED (β= −0.06; p=.036) and PSS (β=-0.01; p=.630), remained unchanged. Independent models predicting weight at 18 months remained non-significant.