Currently submitted to: Journal of Medical Internet Research
Date Submitted: Jun 25, 2026
Open Peer Review Period: Jun 25, 2026 - Aug 20, 2026
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Peer‑to‑Peer Referral Networks and Six‑Month Outcomes in a Tirzepatide‑Supported Digital Weight‑Loss Service: A Retrospective Cohort Study
ABSTRACT
In a retrospective analysis of 34,449 adults using an unsubsidised, tirzepatide‑supported digital weight‑loss service in Australia, patients entering via peer referral showed higher six‑month program adherence and greater percentage weight loss than propensity score–matched non‑referred patients, suggesting that peer‑to‑peer networks may support retention and effectiveness in medicated obesity care.
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