| Grade | Working ability | Systemic symptoms | Analgesics |
| Grade 0: Menstruation is not painful and daily activity is unaffected | Unaffected | None | None required |
| Grade 1: Menstruation is painful but seldom inhibits normal activity; analgesics are seldom required; mild pain | Rarely affected | None | Rarely required |
| Grade 2: Daily activity is affected; analgesics required and give sufficient relief so that absence from school is unusual; moderate pain | Moderately affected | Few | Required |
| Grade 3: Activity clearly inhibited; poor effect of analgesics; vegetative symptoms (headache, fatigue, vomiting, and diarrhea); severe pain | Clearly inhibited | Apparent | Poor effect |
