Values for the KOOS questionnaire, SF-36, and Lysholm score for the study group, with comparison values for different previously published reference groups
| Study group | Reference groups | |||||
|---|---|---|---|---|---|---|
| Mean (SD) | Range | 95% CI | Mean (SD) | Range | 95% CI | |
| For the KOOS questionnaire, reference data are from 59 subjects aged 36 to 79 years obtained in a previous study.39 For the SF-36 questionnaire, reference values are for the general Swedish male population aged 35 to 44 years.27 For the Lysholm score, reference values are for healthy team athletes aged 13 to 25 years.40 | ||||||
| *Significant difference at p<0.05. | ||||||
| ADL, activities of daily living; CI, confidence interval; KOOS, knee injury and osteoarthritis outcome score; QOL, knee related quality of life; SF-36, medical outcomes study 36 item short form health survey; Sport/rec, sport and recreation function. | ||||||
| KOOS (n = 154 + n = 50) | ||||||
| Pain* | 84 (16.1) | (28 to 100) | 81.9 to 87.1 | 96 (9.9) | (50 to 100) | 93.7 to 99.0 |
| Symptoms* | 76 (20.2) | (14 to 100) | 72.5 to 79.0 | 94 (9.9) | (57 to 100) | 92.3 to 96.9 |
| ADL* | 90 (13.5) | (37 to 100) | 88.3 to 92.6 | 96 (10.0) | (47 to 100) | 93.2 to 98.5 |
| Sport/rec* | 63 (28.7) | (0 to 100) | 58.9 to 68.0 | 90 (17.9) | (25 to 100) | 85.6 to 95.1 |
| QOL* | 60 (24.6) | (6 to 100) | 56.2 to 63.9 | 92 (13.5) | (38 to 100) | 88.6 to 95.7 |
| SF-36 (n = 152 + n = 948) | ||||||
| Physical functioning* | 84.5 (14.5) | (35 to 100) | 82.1 to 86.8 | 93.1 (15.4) | (0 to 100) | 92.1 to 94.1 |
| Role–physical* | 81.4 (30.9) | (0 to 100) | 76.5 to 86.4 | 88.5 (26.7) | (0 to 100) | 86.7 to 90.2 |
| Bodily pain | 74.3 (22.9) | (22 to 100) | 70.6 to 78.0 | 78.2 (25.3) | (0 to 100) | 76.6 to 79.8 |
| General health | 82.1 (17.0) | (15 to 100) | 79.4 to 84.8 | 78.3 (20.2) | (0 to 100) | 77.0 to 79.6 |
| Vitality | 70.8 (20.8) | (15 to 100) | 67.5 to 74.1 | 71.6 (21.2) | (0 to 100) | 70.2 to 72.9 |
| Social functioning* | 93.6 (13.9) | (25 to 100) | 91.3 to 95.8 | 89.5 (20.0) | (0 to 100) | 88.2 to 90.8 |
| Role–emotional | 91.0 (22.4) | (0 to 100) | 87.4 to 94.6 | 89.4 (24.3) | (0 to 100) | 87.8 to 91.0 |
| Mental health* | 86.4 (12.9) | (40 to 100) | 84.4 to 88.5 | 82.2 (18.6) | (0 to 100) | 81.0 to 83.4 |
| Lysholm score* (n = 154 + n = 131) | 77.0 (19.1) | (9 to 100) | 73.5 to 79.6 | 99 (2.7) | (77 to 100) | 98.8 to 99.4 |