TABLE 2.

Effects of a weight-loss and lifestyle intervention and weight change over time on body image, perceived health, and health-related self-efficacy

Outcome and follow-up	ba	p	Δ R2b
Body image
6 months
Study arm	.59	.318	.043
Weight change	−.03	.442	.055
Weight change × study arm interaction	−.21	.002	.053
12 months
Study armc	1.66	.009	.068
Weight changec	−.20	<.001	.141
Weight change × study arm interaction	−.04	.581	.001
24 months
Study armc	.60	.375	.012
Weight changec	−.18	<.001	.161
Weight change × study arm interaction	.09	.172	.010
Perceived health
6 months
Study armc	.50	.726	.001
Weight changec	−.03	.697	.001
Weight change × study arm interaction	−.04	.792	<.001
12 months
Study armc	.63	.676	.003
Weight changec	−.11	.218	.009
Weight change × study arm interaction	.14	.437	.004
24 months
Study armc	.37	.805	.002
Weight changec	−.17	.024	.032
Weight change × study arm interaction	.04	.774	.001
Health-related self-efficacy
6 months
Study armc	1.40	.599	.002
Weight changec	−.02	.920	<.001
Weight change × study arm interaction	−.18	.554	.002
12 months
Study armc	4.32	.122	.020
Weight changec	−.19	.237	.009
Weight change × study arm interaction	.45	.180	.011
24 months
Study armc	.72	.799	.002
Weight change	−.47	.001	.065
Weight change × study arm interaction	.33	.241	.008

^aUnstandardized regression coefficient and associated p value for the model after including all four blocks, except where noted

^bIncremental variance in the outcome explained when variable was entered in the model, above and beyond variables already included in the model

^cUnstandardized regression coefficient and associated p value for the full main-effects model, excluding the interaction of weight change and study arm (first three blocks) (reported if the weight change × study arm interaction was not significant)