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Table 2 Characteristics of the studies evaluating the effects of the transforming growth factor-beta 1 (TGF-β1) +915 G/C gene polymorphism on the risk of acute rejection in renal transplantation patients

From: Relationship between TGF-β1 + 869 T/C and + 915 G/C gene polymorphism and risk of acute rejection in renal transplantation recipients

First author and Country/District Ethnicity   AR     Non-AR    HWE NOS
year   TT TC CC Total TT TC CC Total (Y/N) scores
Alakulppi et al. 2004 Finland Caucasian 48 50 210 241 6
Park et al. 2004 Korea Asian 13 0 0 13 151 0 0 151 Y 7
Dmitrienko et al. 2005 Canada Caucasian 40 8 2 50 43 6 1 50 N 7
Li et al. 2007 China Asian 40 6 4 50 49 15 6 70 Y 8
Seyhun et al. 2012 Turkey Caucasian 17 1 1 19 48 23 0 71 Y 7
Dhaouadi et al. 2013 Tunisia African 55 17 8 80 105 38 8 151 Y 7
Chen et al. 2014 France etc. Caucasian 41 9 0 50 243 31 1 275 Y 7
Seyhun et al. 2015 Turkey Caucasian 120 28 2 150 66 23 1 90 Y 7
  1. AR acute rejection, Non-AR non- acute rejection, HWE Hardy-Weinberg equilibrium, Y yes, N no, NOS Newcastle–Ottawa scale. A total score of NOS for each study can vary from 0 (worst) to 9 (best), low-quality studies: 0 to 4 points; high-quality studies: 5 to 9 points