Table 1. English version of the questionnaire used in the study.
Section 1: General Information (9 items)
1. How old are you?
2. What is your weight?
3. What is your height?
4. How old were you when you got your first period?
5. What course are you enrolled in?
6. How many years have you been in university?
7. Do you have a confirmed diagnosis of any of the following diseases? (endometriosis, adenomyosis, uterine fibroid, polycystic ovary syndrome, endometrial polyp, and other diseases)?
8. Do you use any contraceptive method?
9. Which one? (combined pill, hormonal intrauterine device, copper/silver intrauterine device, combined injectable, progesterone injection, male condom, female condom, contraceptive implant, minipill, or other methods)
Section 2: Menstrual cycles (17 items)
10. Do you have periods?
11. Over the past 12 months, have your periods been (regular, irregular, or don't know). Regular = the time between periods is typically about the same length, irregular = if the length of time between periods often changes.
12. What is the usual number of days from the first day of bleeding at one period to the first day of bleeding at your next period?
13. Please tick the column that indicates the heaviness of your bleeding for each day of your period (how it usually is: light, medium, or heavy).
14. Does your bleeding contain clots (sometimes, most of the time, all the time, or not)?
15. Do you miss class because of your periods (no; yes, every month; yes, more than half the months of the year; yes, less than half the months of the year)?
16. If you answered YES to the previous question, why are you missing class (menstrual cramps, excessive bleeding, nausea/vomiting, other reasons)?
17. Please rate any period pain you have had over the past 12 months (VAS).
18. How do you describe this pain (generalized pain, cramping pain, stinging pain, other type)?
19. If you have period pain, do you take medication (I don't take medication; yes, medication at home; yes, medication in a health unit)?
20. Has your period pain worsened over the past 12 months?
21. Does the pain spread to the back, in the lower back?
22. Does the pain spread to the legs and hips?
23. Does the pain become disabling for daily activities?
24. Does the pain prevent you from doing any physical activity?
25. Do you have strong, sharp, and deep internal pain during sexual intercourse?
26. Do you experience pain in certain positions during sexual intercourse?
Section 3: Symptoms related to the period (1 item)
27. In the last 12 months, have you experienced any of the following symptoms related to your period: nausea/vomiting, bloating (swollen tummy), diarrhea, constipation, heartburn/reflux, changes in appetite, aching down the legs, pelvic pain, lower back pain, pain when urinating, pain when full bladder, blood in urine, urgency for urinate, pain when evacuating, blood in feces, discharge vaginal, irritability, anxiety, and depression?

The electronic questionnaire was developed based on the Menstrual Disorder of Teenagers (MDOT). VAS: visual analog scale.