TABLE 5.
Change in Patient-Reported Outcome Measure Scores From Baseline to 5 Years by Mechanical Symptomsa
| Surgery | Nonsurgery | Between-Group Difference | |
|---|---|---|---|
| KOOSPAIN | |||
| No mechanical symptoms | |||
| n | 20 | 15 | |
| Mean (95% CI) | 36.6 (28.4 to 44.7) | 26.9 (17.4 to 36.4) | 9.7 (–3.1 to 22.4) |
| P value | .136 | ||
| Mechanical symptoms | |||
| n | 45 | 19 | |
| Mean (95% CI) | 18.2 (12.8 to 23.5) | 27.5 (19.3 to 35.7) | –9.3 (–19.2 to 0.5) |
| P value | .063 | ||
| Within-group difference | |||
| Mean (95% CI) | 18.4 (8.7 to 28.1) | –0.6 (–13.0 to 11.9) | |
| P value | <.001 | .925 | |
| KOOSSYMPTOMS | |||
| No mechanical symptoms | |||
| n | 19 | 16 | |
| Mean (95% CI) | 25.1 (17.3 to 33.0) | 20.6 (11.7 to 29.4) | 4.6 (–7.2 to 16.4) |
| P value | .445 | ||
| Mechanical symptoms | |||
| n | 46 | 19 | |
| Mean (95% CI) | 13.1 (8.0 to 18.2) | 24.2 (16.4 to 32.1) | –11.1 (–20.5 to –1.8) |
| P value | .020 | ||
| Within-group difference | |||
| Mean (95% CI) | 12.1 (2.7 to 21.4) | –3.6 (–15.6 to 8.3) | |
| P value | .012 | .545 | |
| KOOSADL | |||
| No mechanical symptoms | |||
| n | 20 | 16 | |
| Mean (95% CI) | 28.3 (21.1 to 35.5) | 17.1 (9.0 to 25.2) | 11.2 (0.1 to 22.3) |
| P value | .049 | ||
| Mechanical symptoms | |||
| n | 44 | 18 | |
| Mean (95% CI) | 14.1 (9.4 to 18.8) | 19.8 (12.4 to 27.2) | –5.7 (–14.5 to 3.1) |
| P value | .199 | ||
| Within-group difference | |||
| Mean (95% CI) | 14.2 (5.6 to 22.8) | –2.7 (–13.6 to 8.2) | |
| P value | .001 | .622 | |
| KOOSSPORTS | |||
| No mechanical symptoms | |||
| n | 20 | 14 | |
| Mean (95% CI) | 37.6 (25.5 to 49.8) | 32.4 (17.0 to 47.8) | 5.2 (–15.1 to 25.5) |
| P value | .611 | ||
| Mechanical symptoms | |||
| n | 45 | 19 | |
| Mean (95% CI) | 24.5 (16.5 to 32.5) | 27.9 (15.7 to 40.2) | –3.4 (–18.1 to 11.2) |
| P value | .641 | ||
| Within-group difference | |||
| Mean (95% CI) | 13.1 (–1.3 to 27.6) | 4.5 (–15.2 to 24.1) | |
| P value | .073 | .652 | |
| KOOSQoL | |||
| No mechanical symptoms | |||
| n | 20 | 15 | |
| Mean (95% CI) | 41.6 (31.1 to 51.1) | 31.5 (19.0 to 43.9) | 10.2 (–6.5 to 26.8) |
| P value | .229 | ||
| Mechanical symptoms | |||
| n | 45 | 19 | |
| Mean (95% CI) | 27.4 (20.5 to 34.3) | 31.3 (20.6 to 41.9) | –3.9 (–16.6 to 8.8) |
| P value | .547 | ||
| Within-group difference | |||
| Mean (95% CI) | 14.2 (1.8 to 26.7) | 0.2 (–16.0 to 16.5) | |
| P value | .026 | .978 | |
| EQ-5D | |||
| No mechanical symptoms | |||
| n | 19 | 15 | |
| Mean (95% CI) | 0.23 (0.15 to 0.31) | 0.22 (0.13 to 0.32) | 0.01 (–0.12 to 0.14) |
| P value | .886 | ||
| Mechanical symptoms | |||
| n | 45 | 19 | |
| Mean (95% CI) | 0.17 (0.12 to 0.23) | 0.24 (0.15 to 0.32) | –0.07 (–0.17 to 0.04) |
| P value | .201 | ||
| Within-group difference | |||
| Mean (95% CI) | 0.06 (–0.04 to 0.16) | –0.02 (–0.14 to 0.11) | |
| P value | .239 | .819 | |
| EQ-VAS | |||
| No mechanical symptoms | |||
| n | 19 | 14 | |
| Mean (95% CI) | 21.2 (15.1 to 27.3) | 20.3 (13.2 to 27.4) | 0.9 (–8.5 to 10.3) |
| P value | .846 | ||
| Mechanical symptoms | |||
| n | 44 | 18 | |
| Mean (95% CI) | 15.6 (11.6 to 19.6) | 18.9 (12.6 to 25.3) | –3.3 (–10.8 to 4.2) |
| P value | .385 | ||
| Within-group difference | |||
| Mean (95% CI) | 5.6 (–1.7 to 12.9) | 1.3 (–8.2 to 10.9) | |
| P value | .133 | .779 |
aBolded values indicate statistical significance (P < .05). Adjusted for overall mean scores at baseline. ADL, activities of daily living; EQ-5D, EuroQol 5 dimensions; EQ-VAS, EuroQol visual analog scale; KOOS, Knee injury and Osteoarthritis Outcome Score; QoL, quality of life.