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Table 2 Study characteristics of the included studies (n = 30)

From: Prognostic factors for progression of clinical osteoarthritis of the knee: a systematic review of observational studies

Author [ref.] year Follow-up months Definition of OA for inclusion Age, years Women, % No. of patients Quality score A B C D E F G H I J K L M
Amin [10] 2009 30 ACR criteria 69 42 265 13 1 1 1 1 1 1 1 1 1 1 1 1 1
Tanamas [35] 2010 24 K/L 63.2 ± 10.3 51 109 13 1 1 1 1 1 1 1 1 1 1 1 1 1
Cicuttini [14] 2004 24 K/L 63.1 ± 10.3 58 113 12 1 1 1 1 1 1 0 1 1 1 1 1 1
Hill [19] 2007 30 ACR criteria 66.7 ± 9.2 41 233 12 1 1 1 1 1 1 0 1 1 1 1 1 1
Holla [21] 2014 60 ACR criteria 56.0 ± 5.1 81.3 697 12 1 1 1 1 1 1 1 0 1 1 1 1 1
Tanamas [36] 2010 24 ACR criteria 63.2 ± 10.3 70 109 12 1 1 1 1 1 1 1 0 1 1 1 1 1
Berry [12] 2010 24 ACR criteria 63.7 ± 10.3 58 117 11 1 1 1 1 1 1 1 0 1 0 1 1 1
Henriksen [18] 2013 12 K/L 63 82 157 11 1 0 1 1 1 1 1 1 1 0 1 1 1
Yang [38] 2015 36 K/L 43 % >65 58 1,625 11 1 0 1 1 1 1 0 1 1 1 1 1 1
Alschuler [9] 2013 12 K/L 65.3 ± 9.0 59 797 10 1 1 1 1 1 0 0 0 1 1 1 1 1
Amin [11] 2008 30 ACR criteria 67 ± 9 43 265 10 1 1 1 1 1 1 1 0 1 0 1 1 1
Collins [15] 2014 72 K/L 62 ± 9 59 1,753 10 1 0 1 1 1 0 0 1 1 1 1 1 1
Holla [20] 2010 24 ACR criteria 56.0 ± 5.1 80 832 10 1 1 1 1 1 1 1 0 1 0 1 1 1
Lapane [22] 2015 48 K/L 70 58 1,846 10 1 0 1 1 1 0 0 1 1 1 1 1 1
Larsson [23] 2012 90 OARSI 50 (32–73) 18 74 10 1 1 1 1 1 1 0 0 1 1 1 1 1
Laslett [24] 2014 60 K/L 61 100 323 10 1 1 1 1 1 0 0 1 1 0 1 1 1
Muraki [25] 2012 40 K/L 68.7 ± 11.3 75 1,313 10 1 1 1 1 1 1 0 0 1 1 1 1 1
Podsiadlo [28] 2014 72 ACR criteria 63.9 57 114 10 1 0 1 1 1 1 1 0 1 0 1 1 1
Riddle [30] 2012 48 OARSI 62 58 4,670 10 1 1 1 1 1 1 1 0 1 0 1 1 1
Roemer [32] 2014 60 K/L 64.2 ± 8.4 58 398 10 1 1 1 1 1 0 0 1 1 1 1 1 0
Bruyere [13] 2005 45.6 ACR criteria 64.7 ± 7.0 70 139 9 1 0 1 1 1 1 1 0 1 0 1 1 0
Conaghan [16] 2010 36 K/L 67 ± 10 73 531 9 1 1 1 1 1 1 0 0 1 0 1 1 0
Sharma [34] 2003 36 K/L 68.6 ± 10.8 73 236 9 1 1 1 1 1 1 0 0 1 0 1 1 0
Eckstein [17] 2013 48 K/L 58 64 97 8 1 0 1 1 1 0 1 0 1 1 1 0 0
Oak [26] 2013 48 K/L 61.2 ± 9.1 53 942 8 1 0 1 1 1 0 0 0 1 0 1 1 1
Riddle [29] 2009 24 K/L 61.6 ± 9.3 60 778 8 1 1 1 1 1 0 0 0 1 0 1 1 0
Scher [33] 2008 36 K/L 51 63 73 8 1 0 0 1 1 1 0 0 1 1 1 1 0
van Dijk [37] 2011 36 ACR criteria 65.9 ± 8.3 74 174 8 1 0 1 1 1 1 0 0 1 0 1 1 0
Pisters [27] 2012 60 ACR criteria 66.1 ± 8.5 74 216 7 1 0 1 1 1 0 0 0 1 0 1 1 0
Riddle [31] 2013 33 K/L 62.7 ± 8.6 63 1,410 7 1 0 1 1 1 0 0 0 1 0 1 1 0
  1. A–M represent criteria scores (see Table 1). ACR American College of Rheumatology, K/L Kellgren and Lawrence score, OA, osteoarthritis, OARSI Osteoarthritis Research Society International Atla