Table 1 Inclusion and exclusion criteria for the selection of preprints to be included in the text analysis.
Inclusion criteria | Exclusion criteria | |
|---|---|---|
Topic | All prevention research (see the National Institute of Health Prevention Research [NIHR] Coordinating Committee’s definition)29, which can be categorized into: chemoprevention, counseling, immunization, screening, other primary prevention, other secondary prevention | Tertiary prevention, treatments, all other topics |
Study designs | Clinical studies (including phase 2 trials), epidemiological studies, diagnostic studies | Modeling studies based on nonreal data, in vitro studies, qualitative studies, cost-effectiveness studies, all reviews (also systematic and rapid reviews), and basic research studies |
Publication status | Preprints | All other publication types |
Language | English | Other than English |
Date posted on medRxiv | January 1, 2020 to September 30, 2020 | Later than September 30, 2020 |
