The radiograph status of the contralateral knee in 152 Framingham subjects with medial knee osteoarthritis (OA), including cross-sectional and longitudinal results. Average followup 8.6 ± 1.1 (SD) years; range 6.9 to 11.7 years. Data are n (%).
| Status | Without OA in Contralateral Knee | With Lateral OA in Contralateral Knee | With Medial OA in Contralateral Knee |
|---|---|---|---|
| OA status at baseline | 68 (45) | 5 (3) | 79 (52) |
| OA status at followup (only in those with no OA at baseline) | 8 (12) | 2 (3) | 58 (85) |
| OA status in all subjects at followup | 8 (5) | 7 (5) | 137 (90) |