Table 2. Distribution of GSTT1 null genotype among cases and controls.
| Study | Year | Control | EC | ESCC | EADC | ||||
|---|---|---|---|---|---|---|---|---|---|
| Present | Null | Present | Null | Present | Null | Present | Null | ||
| Makhdoomi MA | 2014 | 367 | 125 | 306 | 186 | 306 | 186 | / | / |
| Sharma A | 2013 | 373 | 63 | 233 | 82 | 233 | 82 | / | / |
| Dura P | 2013 | 463 | 128 | 335 | 97 | 87 | 18 | 248 | 79 |
| Talukdar FR | 2013 | 92 | 38 | 66 | 46 | 66 | 46 | / | / |
| Zhang L | 2013 | 90 | 80 | 62 | 76 | 62 | 76 | / | / |
| Djansugurova LB | 2013 | 35 | 61 | 19 | 88 | 19 | 88 | / | / |
| Gao P | 2012 | 55 | 25 | 18 | 22 | 18 | 22 | / | / |
| Matejcic M | 2011 | 648 | 228 | 375 | 153 | 375 | 153 | / | / |
| Malik MA | 2010 | 146 | 49 | 110 | 25 | / | / | / | / |
| Li D | 2010 | 178 | 102 | 125 | 113 | 125 | 113 | / | / |
| Moaven O | 2010 | 105 | 31 | 112 | 36 | 112 | 36 | / | / |
| Liu R | 2010 | 57 | 40 | 34 | 63 | 34 | 63 | / | / |
| Ji R | 2010 | 122 | 94 | 91 | 98 | 91 | 98 | / | / |
| Zendehdel K | 2009 | 394 | 76 | 150 | 22 | 70 | 7 | 80 | 15 |
| Zhang LW | 2009 | 39 | 33 | 31 | 57 | 31 | 57 | / | / |
| Deng J | 2008 | 75 | 87 | 36 | 51 | / | / | / | / |
| Rossini A | 2007 | 192 | 60 | 110 | 15 | 110 | 15 | / | / |
| Wideroff L | 2007 | 173 | 35 | 59 | 8 | / | / | 59 | 8 |
| Casson AG | 2006 | 80 | 15 | 42 | 14 | / | / | 42 | 14 |
| Jain M | 2006 | 100 | 37 | 72 | 28 | 56 | 20 | 6 | 3 |
| Yin LH | 2005 | 55 | 51 | 60 | 46 | / | / | / | / |
| Roth MJ | 2004 | 211 | 243 | 54 | 77 | 54 | 77 | / | / |
| Abbas A | 2004 | 85 | 30 | 56 | 14 | 31 | 13 | 25 | 1 |
| Wang LD | 2003 | 18 | 20 | 28 | 34 | 25 | 34 | / | / |
| Casson AG | 2003 | 33 | 12 | 37 | 8 | / | / | 37 | 8 |
| Rebeiro | 2003 | 52 | 15 | 26 | 6 | / | / | / | / |
| Gao CM | 2002 | 104 | 119 | 67 | 74 | / | / | / | / |
| Tan W | 2000 | 91 | 59 | 90 | 60 | 90 | 60 | / | / |
| van Lieshout EM | 1999 | 198 | 49 | 28 | 6 | 11 | 2 | 17 | 4 |
| Lin DX | 1998 | 22 | 23 | 26 | 19 | / | / | / | / |
Abbreviations: EC: esophageal cancer; ESCC: esophageal squamous cell carcinoma; EADC: esophageal adenocarcinoma.