Table 2.

Factors associated with longitudinal percent weight loss based on multivariable mixed effect model (n = 699)

Variable	Adjusted mean difference of % weight lossa (95% CI)	p-value
Male vs. Female
At Challenge 1	1.63 (0.70, 2.57)	0.0007
At Challenge 2	1.12 (0.03, 2.21)	0.0438
At Challenge 3	1.14 (−0.62, 2.90)	0.2048
At Challenge 4 & more	0.40 (−1.50, 2.30)	0.6774
Weight at first Challenge registration	0.01 (0.01, 0.02)	< 0.0001
Age at first Challenge	−0.02 (− 0.04, 0.01)	0.2650
English vs Spanish	−0.11 (− 0.84, 0.62)	0.7703
Group vs individual	0.01 (−0.55, 0.58)	0.9590
Number of repeated Challenges	0.27 (0.01, 0.52)	0.0407

^aPositive estimate means more weight loss

% weight loss = ((initial weigh-in at first Challenge – final weigh-in at first Challenge)/(initial weigh-in at first Challenge) × 100%)