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| Therapeutic time (months) | Total cases | Valid cases (%) | Invalid cases (%) | ||
|---|---|---|---|---|---|
| Grade I (%) | Grade I, II and III | Effective rate (%) | |||
| 3 | 98 | 35 (35.71) | 23 | 58 (59.18) | 40 (40.82) |
| 6 | 96 | 36 (37.50) | 22 | 58 (60.42) | 38 (39.58) |
| 9 | 92 | 30 (32.61) | 25 | 55 (59.78) | 37 (40.22) |
| 12 | 89 | 29 (32.58) | 24 | 53 (59.55) | 36 (40.45) |
| 18 | 86 | 28 (32.56) | 23 | 51 (59.30) | 35 (40.70) |
| 24 | 83 | 24 (28.92) | 20 | 44 (53.01) | 39 (46.99) |
