Figure 2.

Age-associated changes in muscle cross sectional area and fatty infiltration in shoulder muscles. Age-associated analyses were performed in five shoulder muscles (supraspinatus, subscapularis, infraspinatus, teres minor, and deltoid) in subjects without RC-tear (A) and in RC-tear (B). (i) Age-associated trends of standardized muscle cross-sectional surface areas. p-values for age-association were calculated using linear regression and are adjusted for gender. Significant trends are depicted in dark purple, non-significant trends are depicted in light purple. (ii) Age-associated increase in fatty infiltration. Fatty infiltration was evaluated according to the Goutallier score.