2.4.3. Visual Analog Scale (VAS)
abdominal cramps, irritability, swelling
SKIN DISORDERS
Between seven days before the expected date of menstruation and four days after menstruation, the participants recorded the degrees of five symptoms once daily: (1) lower abdominal cramps, (2) skin disorders, (3) swelling, (4) irritability, and (5) mood swings on a 100 mm scale from 0 (no symptoms) to 100 (severe symptoms experienced). The maximum values during the seven days from before menstruation to the day before menstruation were designated as ‘premenstrual’ values, while the maximum values during the four days from the first day to the fourth day of menstruation were designated as ‘menstrual’ values. However, if the premenstrual survey period was less than three days due to variations in the predicted date, it was considered missing data.