| Variables | Frequency(n) | Percentage (%) |
|---|---|---|
| Age in years | ||
| 15–25 | 216 | 85 |
| > 26 | 38 | 15 |
| Body mass index(BMI) | ||
| Under weight (BMI < 18.50) | 51 | 20.1 |
| Normal BMI 18.50–24.99) | 199 | 78.3 |
| Over weight (BMI > 24.99) | 4 | 1.6 |
| Marital status | ||
| Single | 174 | 68.5 |
| Has boy friend | 36 | 14.2 |
| Married | 43 | 16.9 |
| Widowed | 1 | 0.4 |
| study year | ||
| 1st year | 85 | 33.5 |
| 2nd year | 109 | 42.9 |
| 3rd year | 29 | 11.4 |
| > 4th year | 31 | 12.2 |
| Age at first Menarche (in years) | ||
| < 13 | 12 | 4.7 |
| 13–15 | 141 | 55.5 |
| 16–18 | 93 | 36.6 |
| > 18 | 8 | 3.1 |
| Number of average days bleeding per one cycle in the last one year | ||
| 1–3 | 74 | 29.1 |
| 4–5 | 133 | 52.4 |
| 6–8 | 37 | 14.6 |
| > 8 | 10 | 3.9 |
| The amount of blood during one menstrual period | ||
| Mild | 29 | 11.4 |
| Moderate | 191 | 75.2 |
| Heavy | 30 | 11.8 |
| Extremely heavy | 4 | 1.6 |