N/A
N=245
QuitBet Phase II: A Digital Social Game That Pays You to Stop Smoking
Smoking Cessation
Bottom Line
View on ClinicalTrials.gov: NCT05075213 ↗Enrolled (actual)
245
Serious AEs
0.4%
Results posted
Feb 2026
Primary outcome: Primary: Number of Participants Who Reported no Cigarette Smoking During the Past 7 Days — 30; 35 Participants
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- contingency management (deposit contract) (Behavioral); leaderboard and social feed (Behavioral); smoking cessation resource list (Behavioral)
- Age
- Adult, Older Adult · 21+ yrs
- Sex
- All
- Sponsor
- WayBetter, Inc.
- Primary completion
- Jul 2024
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number of Participants Who Reported no Cigarette Smoking During the Past 7 Days |
30; 35 | — |
| SECONDARY Number of Participants Who Choose to Play a Second Game |
19; 34 | — |
| SECONDARY Cigarettes Per Day During the Past 7 Days |
4.15; 3.25 | — |
| SECONDARY Number of Participants Who Used Smoking Cessation Medication |
35; 44 | — |
Summary
This study is a randomized controlled trial (RCT) of QuitBet, a digital contingency management program for smoking cessation. QuitBet combines social gaming elements with participant-funded financial incentives in the form of a deposit contract. QuitBet "players" deposit (called the "bet") a specified amount of their own money into the game's "pot." All "winners" who achieve the game's goal split the pot equally, such that their bet is fully refunded plus they receive extra money from the forfeited bets of players who did not meet the goal. Participants (N = 550) will be randomly assigned to QuitBet or QuitBet-NS (deposit contract only, no social elements). All participants will be offered a second game after their first game (up to 8 weeks total game duration) and will be asked to complete a survey after each game and at 1 and 4 months after the end of the second game (3 and 6 months after the start of their first game). The study will compare QuitBet vs. QuitBet-NS on smoking behavior outcomes and examine potential mediators of outcomes such as motivation, engagement, and satisfaction.
Eligibility Criteria
Inclusion Criteria
- Sufficient English fluency to complete study procedures
- At least 21 years of age
- U.S. resident of any state
- currently smokes at least 5 cigarettes per day
- has an email address
- has a mailing address at which they can receive packages
- owns an Internet-connected Apple iPhone or Android smartphone that is compatible with QuitBet
- willing to deposit $30 via PayPal or a credit card
- willing to receive financial incentives earned during QuitBet via PayPal or in a paper check sent by mail
Data sourced from ClinicalTrials.gov (NCT05075213). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.