MTHFR C677T Gene Polymorphism and Head and Neck Cancer Risk: A Meta-Analysis Based on 23 Publications

Table 3

Sensitivity analysis through deleting each study to reflect the influence of the individual dataset to the pooled ORs in CT + TT versus CC model.

Study omitted	Estimate	95% conf. interval
Weinstein et al. (2002) [12]	1.0189941	0.87112659	1.1919612
Kureshi et al. (2004) [20]	1.0193014	0.87365657	1.1892264
Capaccio et al. (2005) [22]	1.0022544	0.85940462	1.1688484
Neumann et al. (2005) [21]	1.007629	0.85724384	1.184396
Vairaktaris et al. (2006) [23]	0.99266464	0.85276967	1.155509
Hung et al. (2007) [27]	1.0095826	0.85412776	1.193331
Hsiung et al. (2007) [26]	1.0266064	0.87583935	1.2033266
Reljic et al. (2007) [25]	1.0438555	0.90103817	1.2093099
Suzuki et al. (2007) [24]	1.0195761	0.86892009	1.1963534
Ni et al. (2008) [29]	0.97470093	0.84459507	1.1248491
Siraj et al. (2008) [35]	0.9954946	0.85466665	1.1595275
Solomon et al. (2008) [28]	0.99778956	0.85548556	1.1637648
Cao et al. (2010) [37]	1.0159856	0.86369467	1.1951293
Kruszyna et al. (2010) [30]	1.0192744	0.87083119	1.1930214
Rodrigues et al. (2010) [36]	1.0113139	0.86534274	1.1819084
Fard-Esfahani et al. (2011) [39]	1.0215796	0.87302911	1.1954068
Prasad and Wilkhoo (2011) [38]	0.99519187	0.85606372	1.1569312
Sailasree et al. (2011) [33]	1.0387301	0.89613956	1.2040093
Supic et al. (2011) [32]	1.0191994	0.87169868	1.1916586
Tsai et al. (2011) [31]	1.0461444	0.90586507	1.2081468
Galbiatti et al. (2012) [34]	1.0096141	0.85997182	1.1852955
Ozdemir et al. (2012) [40]	0.99327004	0.85463184	1.1543981
Vylliotis et al. (2013) [41]	1.0391399	0.89383554	1.2080653
Combined	1.0136127	0.87153344	1.178854