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Table 2 Natural history of subchondral bone cysts

From: The association between subchondral bone cysts and tibial cartilage volume and risk of joint replacement in people with knee osteoarthritis: a longitudinal study

  Whole population (n = 109) No BML or cyst at baseline (n = 36) BML at baseline (n= 21) Cyst at baseline (n = 52)
  No. (%)a No. (%)b No. (%)c No. (%)d
Develop 6 (6.8) 0 6 (40.0) N/A
Progress 21 (23.9) N/A N/A 15 (35.7)
Regress 10 (11.4) N/A N/A 10 (23.8)
Resolve 6 (6.8) N/A N/A 6 (14.3)
Stable 17 (19.3) N/A N/A 17 (40.5)
  1. BML, bone marrow lesion; N/A, not applicable. a88 subjects; b31 subjects; c15 subjects; and d42 subjects of each subgroup participated in the follow-up; thus, the percentages were calculated accordingly.