BACKGROUND
Financial incentives promote many health behaviors, but effective ways to deliver health incentives remain uncertain.
METHODS
We randomly assigned CVS Caremark employees and their relatives and friends to one of four incentive programs or to usual care for smoking cessation. Two of the incentive programs targeted individuals, and two targeted groups of six participants. One of the individual-oriented programs and one of the group-oriented programs entailed rewards of approximately $800 for smoking cessation; the others entailed refundable deposits of $150 plus $650 in reward payments for successful participants. Usual care included informational resources and free smoking-cessation aids.
RESULTS
Overall, 2538 participants were enrolled. Of those assigned to reward-based programs, 90.0% accepted the assignment, as compared with 13.7% of those assigned to deposit-based programs (P<0.001). In intention-to-treat analyses, rates of sustained abstinence from smoking through 6 months were higher with each of the four incentive programs (range, 9.4 to 16.0%) than with usual care (6.0%) (P<0.05 for all comparisons); the superiority of reward-based programs was sustained through 12 months. Group-oriented and individual-oriented programs were associated with similar 6-month abstinence rates (13.7% and 12.1%, respectively; P = 0.29). Reward-based programs were associated with higher abstinence rates than deposit-based programs (15.7% vs. 10.2%, P<0.001). However, in instrumental-variable analyses that accounted for differential acceptance, the rate of abstinence at 6 months was 13.2 percentage points (95% confidence interval, 3.1 to 22.8) higher in the deposit-based programs than in the reward-based programs among the estimated 13.7% of the participants who would accept participation in either type of program.
CONCLUSIONS
Reward-based programs were much more commonly accepted than deposit-based programs, leading to higher rates of sustained abstinence from smoking. Group-oriented incentive programs were no more effective than individual-oriented programs. (Funded by the National Institutes of Health and CVS Caremark; ClinicalTrials.gov number, NCT01526265.)
In this pragmatic trial of smoking cessation, financial incentives added to free cessation aids resulted in a higher rate of sustained smoking abstinence than free cessation aids alone. Among smokers who received usual care (information and motivational text messages), the addition of free cessation aids or e-cigarettes did not provide a benefit. (Funded by the Vitality Institute; ClinicalTrials.gov number, NCT02328794 .).
In September 2011 the Centers for Medicare and Medicaid Services awarded $85 million in grants to ten states to test financial incentive programs to encourage healthy behavior among Medicaid enrollees with chronic diseases. There is little published evidence about the effectiveness of such incentives within the Medicaid program. We evaluated the available research from three earlier Medicaid incentive programs and found mixed results. On the one hand, in Florida only about half of the $41.3 million in available credits was "claimed" by enrollees between 2006 and 2011. On the other, Idaho's incentive program was credited with improving the proportion of children who were up-to-date on well-child visits. Our findings suggest that Medicaid incentive programs should be designed so that enrollees can understand them and so that the incentives are attractive enough to motivate participation. Medicaid incentive programs also should be subject to rigorous evaluation to more clearly establish their effectiveness.
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