| Pre-operative score: 40–49 = n = 11 | Postoperative score: 65–49 = n = 9 | |||
| 50–60 = n = 18 | 70–80 = n = 9 | |||
| 61 and above = n = 2 | 81 and above = n = 13 | |||
| Pre-operative score: 40–49 = n = 11 | Postoperative score: 65–49 = n = 9 | |||
| 50–60 = n = 18 | 70–80 = n = 9 | |||
| 61 and above = n = 2 | 81 and above = n = 13 | |||