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Table 2 Distribution of Genotypes and COL9A3 trp3 Polymorphisms Among Cases and Controls

From: Association of COL9A3 trp3 polymorphism with intervertebral disk degeneration: a meta-analysis

Study ID Year Continent Gender Case Control
Trp3 positive Trp3 negative Trp3 positive Trp3 negative
Bagheri et al. [18] 2016 Asia male 12 21 2 21
female 17 58 8 26
overall 29 79 10 47
Solovieva et al. [14] 2006 Europe male 15 62 8 47
Kales et al. [27] 2004 Europe male 6 62 1 46
female 3 34 4 51
overall 9 96 5 97
Paassita et al. [17] 2001 Europe unknown 40 131 30 291
Kelempisioti et al. [30] 2011 Europe overall 43 249 52 194
Matsui et al. [28] 2004 America overall 7 90 0 10
Eskola et al. [21] 2010 Europe male 2 28 14 59
female 7 29 17 64
overall 9 57 31 123
Rathod et al. [22] 2012 Asia male 3 62 7 60
female 2 33 0 33
overall 5 95 7 93
Zhu et al. [29] 2011 America male 3 11 0 2
female 3 9 0 4
overall 6 20 0 6
Jim et al. [23] 2005 Asia overall 0 290 0 514
Toktas et al. [11] 2015 Europe male 5 70 0 25