Improvement (%) (4 wk/2 wk) | Overall | 66.0/48.2 (35/27) | 64.1/44.6 (34/25) | 52.8/37.5 (28/21) | 50.9/37.5 (27/21) | 49.0/35.7 (26/20) |
| Marked effect | 37.7/33.9 (20/19) | 37.7/35.7 (20/20) | 45.3/26.8 (24/15) | 39.6/26.8 (21/15) | 35.8/25 (19/14) |
| Moderate effect | 28.3/14.3 (15/8) | 26.4/8.9 (14/5) | 7.5/10.7 (4/6) | 11.3/10.7 (6/6) | 13.2/10.7 (7/6) |
| | | | | | |
Failure (%) (4 wk/2 wk) | Overall | 34.0/51.8 (18/29) | 35.9/55.4 (19/31) | 47.2/62.5 (25/35) | 49.1/62.5 (26/35) | 51.0/64.3 (27/36) |
| Mild effect | 11.3/17.8 (6/10) | 11.3/10.7 (6/6) | 11.3/8.9 (6/5) | 5.7/3.6 (3/2) | 3.8/3.6 (2/2) |
| No effect | 18.9/23.2 (10/13) | 15.1/17.9 (8/10) | 20.8/19.6 (11/11) | 22.6/23.2 (12/13) | 26.4/25.1 (14/14) |
| Loss of follow up | 3.8/7.1 (2/4) | 7.6/17.8 (4/10) | 9.5/19.6 (5/11) | 11.3/19.6 (6/11) | 11.3/19.6 (6/11) |
| Surgery | 0/3.6 (0/2) | 1.9/8.9 (1/5) | 5.7/14.2 (4/8) | 9.5/16 (5/9) | 9.5/16 (5/9) |