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Descriptive statistics (n=807 knees, one knee per subject)*
| Age, years | 62 (8.0) |
| Female (%) | 64% |
| BMI, kg/m2 | 30 (4.8) |
| ISR | 1.1 (0.16) |
| ISR, range | 0.80–1.66 |
| Knees with patella alta** | 29% |
| Quadriceps strength, Newton-meter/kg | 0.99 (0.44) |
| Females | 0.83 (0.35) |
| Males | 1.27 (0.44) |
Values are mean ± SD unless otherwise indicated
(ISR ≥1.2)
