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Premenstrual syndrome (PMS) is characterized by physical, cognitive, and behavioral symptoms that occur cyclically, from several days to 2 weeks before menses, which resolve either quickly or during the early days of menstruation. The aim of this study was to determine the factors associated with the severity of PMS in Iranian college students.

The cross‐sectional study was performed among 298 college students (aged 18–35 years) with PMS, of whom, 271 college students completed the Iranian version of the Premenstrual Symptoms Screening Tool questionnaire to determine the severity of PMS. Factors associated with PMS severity were identified using linear regression analysis with a stepwise method.

Factors associated with severity of PMS were age (years), family income (low vs high income), marital status (unmarried vs married), and familial history of dysmenorrhea or PMS after …