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Fig. 2 | Arthritis Research & Therapy

Fig. 2

From: Evaluation of a quantitative measurement of suprapatellar effusion by ultrasonography and its association with symptoms of radiographic knee osteoarthritis: a cross-sectional observational study

Fig. 2

Scattergram of the suprapatellar effusion area and knee injury and osteoarthritis outcome scale (KOOS) subscales. The y-axis corresponds with each KOOS subscale, and the x-axis corresponds with the summed area (mm2) of suprapatellar effusion evaluated by ultrasonography (Fig. 1). The summed value of the effusion area was calculated by adding the value for the effusion areas of the right and left knees. a KOOS pain subscale; b KOOS symptom subscale; c KOOS activities of daily living (ADL) subscale; d KOOS sport and recreation subscale; e KOOS quality of life (QOL) subscale

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