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Table 3 Semiquantitative evaluation of tendon alterations in women according to the Bonar Scale

From: The role of estrogen and progesterone receptors in the rotator cuff disease: a retrospective cohort study

Variables Grade 0 Grade 1 Grade 2 Grade 3
Tenocytes 0 (0%) 3 (20%) 8 (53.3%) 4 (26.7%)
Ground substance 2 (13.3%) 5 (33.3%) 7 (46.7%) 1 (6.7%)
Collagen 0 (0%) 0 (0%) 12 (80%) 3 (20%)
Vascularity 4 (26.7%) 5 (33.3%) 1 (6.7%) 5 (33.3%)
  1. Data are absolute values and percentages of positively stained cells in women’s samples for the 4 parameters of the Bonar Scale: it allows a semiquantitative analysis of tendinopathy considering alterations of tenocytes, ground substance, collagen and vascularity. Each parameter is scored with a four-point scoring system, with 0 indicating healthy tissue and III highly degenerated tissue. The final score is comprised between 0 (normal tendon) and 12 (most severe abnormality detectable)