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Table 1 Demographical representation of human subjects enrolled in the study

From: Osteogenic protein 1 in synovial fluid from patients with rheumatoid arthritis or osteoarthritis: relationship with disease and levels of hyaluronan and antigenic keratan sulfate

Group Sample number Age (years) Sex Race Collins grade
Donors 1 66 Female Caucasian 4
  2 69 Male Caucasian 2
  3 54 Male Caucasian 2
  4 74 Male Caucasian 3
  5 79 Male African-American 2
  6 67 Male Caucasian 4
  7 67 Male Caucasian 4
  8 52 Male Caucasian 2
  9 67 Female Caucasian 3
  10 40 Female African-American 1
  11 54 Male Caucasian 0
  12 92 Female Caucasian 2
  13 73 Male Caucasian 2
  14 53 Male African-American 0
Osteoarthritis patients 1 84 Male   
  2 85 Male   
  3 81 Male   
  4 81 Male   
  5 82 Male   
  6 84 Male   
  7 53 Female   
  8 58 Male   
  9 60 Female   
  10 54 Female   
  11 60 Female   
  12 75 Female   
  13 81 Female   
  14 41 Male   
  15 75 Female   
  16 67 Female   
  17 64 Female   
  18 87 Female   
  19 71 Male   
  20 70 Female   
  21 53 Female   
  22 71 Male   
  23 82 Male   
  24 79 Female   
  25 37 Female   
  26 51 Male   
  27 81 Male   
  28 83 Female   
  29 40 Female   
Rheumatoid arthritis patients 1 47 Female   
  2 42 Female   
  3 73 Female   
  4 56 Female   
  5 26 Female   
  6 41 Male   
  7 62 Male   
  8 53 Female   
  9 66 Female   
  10 66 Female   
  11 26 Female   
  12 26 Female   
  13 73 Female   
  14 42 Female   
  15 34 Female   
  16 49 Female   
  17 70 Male   
  18 53 Male   
  19 52 Male   
  20 40 Female   
  21 68 Female   
  22 49 Male   
  23 76 Male   
  24 22 Female   
  25 72 Female   
  1. Collins grade was assigned only to the cadaveric joints. Racial background of the osteoarthritis patients and of the rheumatoid arthritis patients was not available to us.