Comment on: Sleep patterns and quality depend not only on gender and the time of year, but also on a variety of other influencing factors

To the Editor We have read with interest the article by Alshahrani et al[1][1] on a prospective cohort study of sleep behaviour and sleep quality during summer vacation and weeks 1-4 of the academic year among 385 female college students using a questionnaire and the Sleep Quality Scale (SQS).[1][