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Original Investigation

Open Science Policies and Practices Among Medical Journals

JAMA Network Open 10.1001/jamanetworkopen.2026.32070

September 04, 2026 at 11:00 AM EDT

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In this cross-sectional study of 15 624 articles in 10 leading medical journals, journal policies were only partially aligned with TOP2025, and article-level open science practices were more frequently reported for RCTs than for other designs, supporting the need for stronger journal policies.

Corresponding Author: Constant Vinatier, MS, PharmD, University of Rennes, 9 Av. du Professeur Léon Bernard, Rennes 35000, France (constant.vinatier1@gmail.com).

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