Examining Social Influence on Participation and Outcomes among a Network of Behavioral Weight-Loss Intervention Enrollees

Table 1

Characteristics of study sample (𝑛=92).

	Total samples (𝑛=92)	Report no social contact (𝑛=43)	Report previous social contact (𝑛=19)	Report current social contact (𝑛=30)	𝑃 value^a
Baseline sociodemographic factors
Black (%)	54.3	39.5	68.4	66.7	0.03
Age (yrs)	45.8 ± 9.7	47.4 ± 10.5	45.2 ± 10.4	43.7 ± 7.6	0.26
Weight (kg)	101.7 ± 17.7	97.1 ± 16.6^e	101.9 ± 19.2^e,f	108.1 ± 16.9^f	0.03
BMI (kg/m^2)	38.1 ± 6.0	36.8 ± 6.1^e	37.7 ± 5.3^e,f	40.5 ± 5.8^f	0.03
Weight loss at 6 months^b
Total weight loss (kg)	4.9 ± 5.5	3.7 ± 5.7	5.2 ± 4.6	6.4 ± 5.5	0.11
% of weight loss	4.9	3.9	5.3	6.1	0.25
Behavioral adherence measures^b
% of group sessions attended (out of 24)	64.5	53.6^e	74.8^f	73.1^f	<0.01
% of journals submitted (out of 23)	62.1	54.3	66.3	70.1	0.12

Mean ± SD; ^a𝜒² test for categorical variables, independent 𝑡-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 (𝑃≤0.05).