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Comparison of the excellent and good ratings of the treatment between the 2 groups of patients.
| Ratings | Control group (n=21) | Study group (n=21) | Comparison | P value |
| Harris score, mean (SD) | 88.86 (9.24) | 94.24 (7.52) | t40=2.060 | .045 |
| Excellent, n (%) | 4 (19) | 13 (62) | χ1=8.005 | .005 |
| Good, n (%) | 8 (38) | 6 (29) | χ1=0.429 | .51 |
| Average, n (%) | 7 (33) | 2 (10) | χ1=2.263 | .13 |
| Poor, n (%) | 2 (10) | 0 (0) | χ1=0.525 | .47 |
| Excellent and good, n (%) | 12 (57) | 19 (90) | χ1=6.035 | .01 |
