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Table 1 Characteristics of 50 studies reporting prevalence of cervical subluxations

From: Cervical spine involvement in rheumatoid arthritis over time: results from a meta-analysis

Year of publication First author (reference) Country STROBE checklist (total = 22) Sample size Female, number (percentage) Mean age, years Disease duration, years
1963 Bland [21] USA 11 100 65 (65%) 56 14.4
1966 Conlon [2] New Zealand 14 333 230 (69%) 52.7 N/A
1969 Park [3] USA 12 100 N/A N/A 10
1971 Meikle [4] Scotland 15 118 83 (70%) 57.6 12.9
1971 Isdale [22] New Zealand 13 171 N/A N/A 12.1
1971 Stevens [10] UK 16 100 73 (73%) 54.2 11.3
1972 Smith [23] UK 13 962 588 (61%) 51.3 7.4
1975 Henderson [24] UK 15 476 N/A N/A N/A
1976 Shaw [25] UK 11 100 73 (73%) 54.2 N/A
1978 Higashiyama [26] Japan 12 100 91 (91%) N/A N/A
1978 Chevrot [27] France 14 577 N/A N/A N/A
1979 Jensen [28] Denmark 14 194 N/A N/A N/A
1981 Winfield [29] UK 14 100 56 (56%) 54.8 7.7
1981 Pellici [15] USA 14 106 88 (83%) 62.6 30.1
1982 Halla [17] USA 15 126 86 (68%) 57.6 11.1 s
1983 Winfield [7] UK 17 100 57 (57%) 57.1 10.0
1984 Haaland [30] Norway 16 104 77 (74%) N/A 15.3
1985 Redlund-Johnell [31] Sweden 16 450 351 (78%) 63.5 N/A
1987 Morizono [32] Japan 14 100 92 (92%) 57.1 12.8
1989 Floyd [11] South Africa 15 250 187 (75%) 52.8 N/A
1989 Collins [33] USA 14 113 59 (52%) 55 15
1990 Kauppi [34] Finland 17 164 136 (83%) 57.3 19.3
1990 Halla [35] USA 16 310 198 (64%) 68.8 10.2
1993 Veerapen [36] Malaysia Britain 18 140 140 (100%) 46.5 10.1
1994 Stiskal [37] Austria 18 136 110 (81%) 57 13
1994 Montemerani [38] Italy 17 183 147 (80%) 33.4 12.3
1996 Aggarwal [39] India 16 100 73 (73%) N/A 5
1998 Fujiwara [8] Japan 17 173 146 (84%) 55.6 12.5
1998 Schramm [40] Germany 14 150 134 (89%) 56.5 12.3
1999 Yoshida [41] Japan 16 297 251 (85%) 57.0 13.0
2000 Fujiwara [42] Japan 15 161 134 (83%) 59.5 16.5
2000 Neva [43] Finland 16 176 111 (63%) 48.5 2.5
2001 Riise [44] Norway 16 241 156 (65%) 61.9 5.4
2003 Carmona [45] Spain 18 788 562 (71%) 61.0 10.0
2003 Neva [46] Finland 17 103 70 (68%) 56.0 9.8
2004 Mitsuka [47] Japan 15 174 156 (90%) 60.9 19.1
2004 Pisitkun [48] Thailand 17 134 124 (93%) 48.9 5.0
2004 Naranjo [49] Spain 16 736 530 (72%) 61.4 9.0
2005 Zikou [50] Greece 17 165 143 (87%) 59.6 12.3
2005 Vesela [51] Czech Republic 15 400 N/A N/A N/A
2006 Neva [52] Finland 18 154 117 (76%) 62.0 16.0
2008 Kim [53] Korea 18 405 365 (90%) 56.0 10.8
2009 Al-Ghamdi [54] Saudi Arabia 18 140 105 (75%) 47.2 6.9
2010 Imagama [12] Japan 17 100 84 (84%) 61.0 13.0
2010 Ahn [55] Korea 16 1,120 N/A N/A N/A
2011 Yurube [56] Japan 18 267 220 (82%) 66.9 N/A
2012 Hirano [9] Japan 18 101 N/A 65.6 19.2
2012 Yurube [57] Japan 19 140 107 (76%) 68.3 18.5
2012 Eser [58] Japan 17 150 126 (84%) 53.2 12.3
2013 Blom [59] The Netherlands 16 134 90 (67%) 60.6 9.5
  1. N/A, not applicable; STROBE, Strengthening the Reporting of Observational Studies in Epidemiology.