Table 2.

Descriptive Statistics for Psychosocial Measures at Week ‐17 (n = 573^a)

Measure	Possible range	Mean (Standard Deviation)	Cronbach's alpha
Favorable expectations about weight lossb	‐4 ‐ +4	2.5 (1.0)	.86
Self‐efficacy to initiate diet	0‐3	2.1 (0.4)	.90
Intentions to change diet	1‐7	6.2 (0.9)	.95
Autonomous motivation for eating healthy	1‐7	6.5 (0.7)	.85
Controlled motivation for eating healthy	1‐7	3.6 (1.5)	.84
Encouragement for dietc	5‐25	15.8 (5.5)	.86
Discouragement for dietc	5‐25	11.0 (4.2)	.78
Self‐efficacy to initiate physical activity	0‐3	2.1 (0.5)	.93
Intentions to engage in physical activity	1‐7	6.2 (1.2)	.98
Autonomous motivation for physical activity	1‐7	6.5 (0.8)	.91
Controlled motivation for physical activity	1‐7	3.7 (1.6)	.87
Participation in physical activityc	5‐60	32.2 (11.9)	.93

^aMissing values were present for 1 to 2 of the n = 573 eligible patients for each psychosocial measure in this table, unless noted otherwise.

^bNegative numbers indicate unfavorable expectations (e.g., ‐4 = health will worsen a great deal); positive numbers indicate favorable expectations (e.g., +4 = health will improve a great deal).

^cThese measures were administered only to the subset of n = 489 participants who responded that they had a support person. There were no missing values for the encouragement or discouragement for diet measures, and n = 1 missing value for the participation in physical activity measure.