Table 1: Characteristics of study sample ( ).

Total samples ( )Report no social contact ( )Report previous social contact ( )Report current social contact ( ) valuea

Baseline sociodemographic factors
 Black (%) 54.339.568.466.70.03
 Age (yrs)45.8 ± 9.747.4 ± 10.545.2 ± 10.443.7 ± 7.60.26
 Weight (kg) 101.7 ± 17.797.1 ± 16.6e101.9 ± 19.2e,f108.1 ± 16.9f0.03
 BMI (kg/m2)38.1 ± 6.036.8 ± 6.1e37.7 ± 5.3e,f40.5 ± 5.8f0.03
Weight loss at 6 monthsb
 Total weight loss (kg)4.9 ± 5.53.7 ± 5.75.2 ± 4.66.4 ± 5.50.11
 % of weight loss 4.9 3.9 5.3 6.1 0.25
Behavioral adherence measuresb
 % of group sessions attended (out of 24)64.553.6e74.8f73.1f<0.01
 % of journals submitted (out of 23)62.154.366.370.10.12

Mean ± SD; a test for categorical variables, independent -test, or analysis of variance for continuous variables; bcontrolled for baseline weight and race; e,fmeans with common superscripts across columns are not significantly different based on Bonferroni post hoc analyses ( ).