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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Am J Phys Med Rehabil. 2016 Dec;95(12):931–938. doi: 10.1097/PHM.0000000000000534

Figure 1.

Figure 1

Knee extensor (A) and flexor (B) muscle strength (Newtons/kg) and 95% confidence intervals for males and females at baseline and 24 months. Values written in text for each group represent mean change in muscle strength (95% confidence interval) from baseline to 24 months.

Group 1: knees with both radiographic and pain progression; Group 2: knees with isolated radiographic progression; Group 3: knees with isolated pain progression; Group 4: knees with neither radiographic nor pain progression.