Table 1.
Patient Characteristics of the 80 Knees in 78 Patients Included in the Follow-up Cohort a .
| Patient Characteristics | n (%) | Median (IQR) |
|---|---|---|
| Age at surgery (years) | 31.5 (23-39) | |
| Age at follow-up (years) | 56.5 (48-64) | |
| Follow-up time (years) | 25 (25-26) | |
| Age <40 years | 61 (76%) | |
| Age ≥40 years | 19 (24%) | |
| Male knees | 47 (59%) | |
| Female knees | 33 (41%) | |
| Defect size (cm2) | 3.0 (2.0-4.0) | |
| Defect location | ||
| Medial femoral condyle | 26 (32.5%) | |
| Lateral femoral condyle | 2 (2.5%) | |
| Patella/trochlea | 36 (45%) | |
| Multiple | 16 (20%) | |
| Time since onset symptoms (months) | 36 (24-60) | |
| Knee with previous surgery | 61 (76%) | |
| Knee without previous surgery | 19 (24%) | |
| Arthroscopic degree of osteoarthritis at surgery (Outerbridge classification) | ||
| None (grade 0) | 58 (72.5%) | |
| Little (grades 1-2) | 16 (20%) | |
| Definite (grades 3-4) | 6 (7.5%) | |
n = number of knees; IQR = interquartile range.
a
Values are described as a count and percentage of the total 80 knees or as a median with subsequent interquartile range.