Figure 3

Distribution of SF levels of ARGS-aggrecan by gender, age, joint space narrowing (JSN) sum score, osteophyte (OST) sum score, and the sum of the JSN and OST sum scores, termed radiographic OA (ROA) sum score. Open boxes or circles represent men; grey boxes and circles represent women. (a) A box plot of SF ARGS in men (n = 116) and women (n = 25). The ends of the boxes define the 25^th and 75^th percentiles, with a line at the median, error bars defining the 10^th and 90^th percentiles and circles for individual outliers. Shaded area with line defines the 25^th and 75^th percentiles and median of the non-operated reference group (n = 17). Group difference was assessed by ANCOVA adjusted for age, body mass index, and time between meniscectomy and examination A. (b) Regression of SF ARGS and age with Pearson's correlation coefficient (r). (c through e) Regression of SF ARGS and JSN, OST, and ROA sum scores with Spearman's rank order correlation coefficients (r_S).