This prospectively registered review characterizes 50 intervention studies from the 1st wave of the Innovation Fund based on study protocols or original articles, among other sources. The mainly (randomized) controlled intervention studies included predominantly adults/seniors in ambulatory care without a regional focus and analyzed treatment processes, clinical and patient outcomes as outcomes. The substantial lack of study protocols and methodological details (e. g., sample size planning) reveals (avoidable) methodological problems regarding the scientific quality of the funded studies.
