6.Demographic and gynaecological characteristics were assessed using a demographic sheet that includes: participants' age, marital status, employment status, smoking status, regular coffee intake, daily sleeping hours, using of oral contraceptives for treatment of PMS or PMDD, absence from work due to PMS/PMDD, educational level, income level, weight and height, age at menarche, regularity, frequency, duration and intensity of menstrual cycle.