Caracterização e distribuição de cronotipos no sul do Brasil: diferenças de gênero e estação de nascimento Characterization and distribution of chronotypes in southern Brazil: gender and season of birth differences

Objective: To analyze circadian typology (diurnal preference) and gender differences in a univer sity student population from Southern Brazil. Methods: Seven hundred and thirty six university student volunteers, with an age range 17-49 years, filled the Brazilian version of the Chronotype Questionnaire (CQ), the portuguese translation of the Horne and Ostberg’s Morningness–Eveningness Questionnaire (MEQ). Central and dispersion tendencies measures and CQ scores distribution curve (Kolmogorov-Smirnov) were calculated according to gender (Student t), age, birth season, and daylight-saving time discomfort (qui-square). Results: Six hundred and fourty eight