Objective: To quantify student participation in the publication of original contributions in Peruvian medical journals indexed to SciELO Peru. Design: Retrospective observational study. Setting: Archives of the UNMSM Faculty of Medicine and in www.scielo.org.pe. Population: Original papers, short communications (included case reports) and letters to the editor published from 1997 through 2005 in updated quarterly journals. Interventions: Review of authors affiliation (student or professional; sex, university and professional studies of origin), article type and research area (clinical, biomedical, public health). Principal outcome measures: Frequency and percentage of papers with student participation. Results: We included 865 original contributions from four journals; in 4,5% (39) students participated in the authorship, 74% (29/39) were original papers, 10 short communications and ther...