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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Am J Prev Med. 2018 Jan 12;54(3):e41–e47. doi: 10.1016/j.amepre.2017.11.007

Table 2.

Participant Adherence

IBWL IBWL + $
Adherence and earnings Lower
income		 Higher
income		 Lower
income		 Higher
income
Percentage of weeks participants logged in 70.2% 82.1% 78.6% 90.9%
Percentage of lessons viewed 47.1% 59.6% 67.2% 62.0%
Percentage of weeks participants submitted at least 5 days of self-monitoring data 23.6% 48.7% 49.0% 60.9%
Total self-monitoring earnings, mean (SD) – – $17.8±17.9 $27.4±14.9
Percentage of eligible participants who won a raffle prize – – 30.0% 30.0%
Completion rate 90.5% 88.7% 100% 92.3%

Note: Given that study was included as a covariate, adjusted means are presented.

IBWL, Internet behavioral weight loss; IBWL+$, Internet behavioral weight loss plus financial incentives