Figure 2From: Knee extension range of motion and self-report physical function in total knee arthroplasty: mediating effects of knee extensor strength Scattergram of changes in knee extensor strength versus changes in knee extension ROM in 441 patients. The straight line represents ordinary least product regression line with its 95% confidence limits (curved lines): (changes in knee extensor strength) = 3.0 ( 2.5 to 3.4 ) + 1.18(1.10 to 1.29) X (changes in knee extension ROM). Observed change scores of the knee ROM and strength measures are indicated by the short vertical lines above the x- and y-axes, respectively.Back to article page