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Table 1 Characteristics of studies that entered the meta-analysis stage

From: The effect of polymorphisms (174G> C and 572C> G) on the Interleukin-6 gene in coronary artery disease: a systematic review and meta-analysis

Rows Name [references] country Year of publish Mean age of case group (SD) Mean age of control group (SD) Case Group Population Control group population
1 Amorim, Fernanda Gobbi [28] Brazil 2011 54.9 +  1.1 54.9 +  1.1 72 71
2 Ansari, Wafa Munir [29] Pakistan 2017 42±3.80 42±3.80 340 310
3 Babu, Baddela M. V. Srikanth [30] India 2012 53.56 ±11.72 52.62 ± 8.45 651 432
4 Banerjee, Indranil [31] India 2009 56.3 ± 12.1 56.0 ± 9.5 210 232
5 Basso, F [32]. America 2002 56±5 56±5 498 1108
6 Bhanushali, A. A [33]. India 2013 48±11 50±11 100 150
7 Chen, H [34]. China 2018 61.00 ± 10.49 60.37 ± 10.38 322 429
8 Elsaid, A [35]. Egypt 2014 53.54 ± 9.1 45.3 ± 7.2 108 143
9 Fan, W. H [36]. China 2011 52.1 ± 6.8 52.3 ± 8.8 84 130
10 Fragoso, J. M [22]. Mexico 2010 58.88 ±11.7 56.03 ±4.13 284 247
11 Galimudi, R. K [37]. India 2014 65±5 64±6 200 200
12 Gao, Y. L. [38] China 2016 61.50±10.53 52.54±10.65 275 286
13 Ghazouani, Lakhdar [39] Tunisia 2010 58.1±12.0 56.7±14.1 418 406
14 Humphries, S. E [40]. England 2001 56·7±3·6 56·0±3·4 162 2589
15 Indumathi, B [41]. India 2019 56.00 ± 12.00 265 205
16 Jabir, N. R [42] Saudi Arabia 2017 60.6±8.85 47.7±5.06 90 89
17 Jia, X. W [43]. China 2010 231 210
18 Jun, M [44]. China 2017 63.5±13.6 64.2±14.1 860 862
19 Li, L. [45] China 2015 365 365
20 Maitra, A [46]. India 2008 57.17 ± 9.22 45.53 ± 5.98 46 40
21 Mao, L. [47] China 2016 62.65 ± 9.72 56.82 ± 9.80 224 260
22 Mastana, S [48]. India 2017 49.51±11.06 45.02±14.46 143 136
23 Mitrokhin, V [49]. Russia 2017 70.37±13.45 74.94±7.43 198 116
24 Nauck, M [50]. Germany 2002 63.77±9.89 58.30±11.83 2575 729
25 Omer, W [51]. Turkey 2016 42 ±3.80 39 ± 7.8 340 310
26 Phulukdaree, Alisa [52] India 2013 37.5 41 61
27 Rios, D. L. S [53]. Brazil 2010 414 253
28 Sarecka-Hujar, Beata [54] Poland 2008 43.8±6.1 35.4±10.4 177 202
29 Satti, H. S [55]. Pakistan 2013 46.4 ± 18.7 35.2 ± 17.4 36 52
30 Sekuri, C [56]. Turkey 2007 46.3 ±7.8 44.3 ±7.2 115 105
31 Shabana, N. A [4]. Pakistan 2018 59.10 ± 12.64 56.0 ± 10.4 404 219
32 Sun, G. Q [57]. China 2014 61.2 ± 8.5 56.4 ± 11.6 296 327
33 Tong, Z. C [58]. China 2013 61.4±8.7 60.6±9.6 326 341
34 Tütün, Ufuk [59] Turkey 2006 29.3± 4.3 31.1 ± 4.0 21 50
35 Wang, K [60] China 2015 65.4 ± 8.4 64.9 ± 8.2 402 402
36 Yang, H. T [61]. China 2015 410 410
37 Yao, H. M [17]. China 2016 62.64±8.43 61.43±7.85 275 296