Primary outcomes of the trial at 24-month follow-up. Values are means with 95% CIs
| Primary outcomes | APM (n=70) | Placebo surgery (n=74) | Improvement from baseline | Between-Group Difference in Improvement from Baseline | |
| APM | Placebo surgery | ||||
| Unadjusted | |||||
| WOMET score* | 83.7 (79.0 to 88.3) | 83.9 (79.9 to 87.9) | 27.3 (22.1 to 32.4) | 31.6 (26.9 to 36.3) | −4.3 (−11.3 to 2.6) |
| Lysholm knee score† | 83.3 (79.5 to 87.1) | 85.9 (83.1 to 88.8) | 23.1 (18.8 to 27.4) | 26.3 (22.6 to 30.0) | −3.2 (−8.9 to 2.4) |
| Pain after exercise‡ | 2.3 (1.7 to 2.9) | 2.3 (1.7 to 2.9) | 3.5 (2.8 to 4.2) | 3.9 (3.3 to 4.6) | −0.4 (−1.3 to 0.5) |
| Adjusted§ | |||||
| WOMET score | 80.9 (75.4 to 86.5) | 86.1 (80.5 to 91.8) | 26.6 (21.1 to 32.2) | 31.8 (26.2 to 37.5) | −5.2 (−13.1 to 2.7) |
| Lysholm knee score | 82.2 (78.2 to 86.3) | 86.5 (82.3 to 90.6) | 22.3 (18.3 to 26.3) | 26.6 (22.4 to 30.7) | −4.3 (−10.0 to 1.5) |
| Pain after exercise | 2.3 (1.5 to 3.1) | 1.9 (1.1 to 2.7) | 3.7 (2.9 to 4.5) | 4.1 (3.3 to 4.9) | −0.4 (−1.5 to 0.7) |
*The WOMET contains 16 items addressing three domains: 9 items addressing physical symptoms; 4 items addressing disabilities with regard to sports, recreation, work and lifestyle and 3 items addressing emotions. The score indicates the percentage of a normal score; therefore, 100 is the best possible score and 0 is the worst possible score.
† The Lysholm knee score is based on an eight-item questionnaire designed to evaluate knee function and symptoms in activities of daily living. Scores range from 0 to 100; higher scores indicate less severe symptoms.
‡ Knee pain after exercise (during the preceding week) was assessed on a rating scale of 0–10, with 0 denoting no pain and 10 denoting extreme pain.
§ Values are adjusted with the baseline score, study site, age, sex and the absence or presence of minor degenerative changes on a radiograph (Kellgren–Lawrence grade 0 or 1, respectively).
APM, arthroscopic partial meniscectomy; WOMET, Western Ontario Meniscal Evaluation Tool.