Table 2: Sociodemographic characteristics of individual social contacts ( ).

Total ( )
Previous participant ( )Concurrent participant ( ) valuea

Baseline sociodemographic factors
 Black (%)72.778.969.40.34
 Female (%)96.494.797.20.58
 Age (yrs)44.3 ± 9.544.2 ± 10.744.3 ± 9.00.10
 Weight (kg)104.1 ± 16.1106.3 ± 18.9104.1 ± 16.10.64
 BMI (kg/m2)39.0 ± 5.339.4 ± 5.438.8 ± 5.30.69
Weight loss at 6 months
 Total weight loss (kg)7.7 ± 5.98.7 ± 4.37.2 ± 6.60.35
 % of weight loss 7.78.77.10.33
Behavioral adherence measures
 % of group sessions attended 78.282.375.90.32
 % of journals submitted 75.784.371.10.08

a test for categorical variables, independent -test for continuous variables.