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| Treatment frequency | No | % |
| Number of treatment courses with isotretinoin | ||
| 1 course | 227 | 63.2% |
| 2 courses | 75 | 20.9% |
| >2 courses | 57 | 15.9% |
| Duration of taking isotretinoin (months) | ||
| 2-4 months | 127 | 35.4% |
| 5-7 months | 150 | 41.8% |
| 8-10 months | 52 | 14.5% |
| 11-12 months | 30 | 8.4% |
| Are you taking isotretinoin with a doctor's prescription? | ||
| Yes | 342 | 95.3% |
| No | 17 | 4.7% |
