Table 2.

Type of Stakes and Percentage Weight Loss per Week.^a,^b

Number of Cases	Model 1c, Beta, N = 3857	95% CI	Model 2d, Beta, N = 3857	95% CI	Model 3e, Beta, n = 1540	95% CI	Model 4f, Beta, n = 1079	95% CI
Type of deposit
Anticharity	− 0.36	−0.39 to −0.33	− 0.33	−0.36 to −0.31	− 0.32 g	−0.35 to −0.29	− 0.26	−0.30 to −0.23
Charity	− 0.32	−0.36 to −0.28	− 0.28	−0.31 to −0.25	− 0.30 g	−0.34 to −0.26	− 0.19 g	−0.24 to −0.13
Friends	−0.25	−0.29 to −0.21	− 0.25	−0.29 to −0.22	−0.26g	−0.32 to −0.21	− 0.17 g	−0.22 to −0.13
No deposit	Ref		Ref		Ref		Ref
Contract <12 weeks			− 0.3	−0.32 to −0.28
Has verified contract			0.04 h	0.02 to 0.06
Has supporters on  website			0.03	0.00 to 0.06	0.05 i	0.00 to 0.10	0.02	−0.02 to 0.05
Has friends on website			0.02	−0.04 to 0.08	0.01	−0.09 to 0.10	0	−0.06 to 0.07

Abbreviations: CI, confidence interval; Ref, reference category.

^aParticipants were located in various locations (online) from 2013 to 2014.

^bBolded values indicate P value of <0.001.

^cIncludes all contracts, controlling for age and sex.

^dIncludes all contracts, controlling for sex, age, number of friends, length of contracts, and verification status.

^eIncludes contracts 12 weeks or more that were not verified (i.e. no referee or wireless scale), controlling for above factors.

^fIncludes contracts 12 weeks or more that were verified, controlling for above factors.

^gGroups that are not statistically different from each other at the overall P = 0.05 level in models 3 and 4.

^hP = 0.001.

ⁱP = 0.03.