Table 2. Host characteristics of study groups in this meta-analysis.
| Author, year |
Sample size |
Age, yrs |
Male, % |
BMI, kg/m2 |
Smoking, % |
Drinking, % |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cases | Controls | Cases | Controls | Cases | Controls | Cases | Controls | Cases | Controls | Cases | Controls | |
| Lan, 2008 | 104 | 104 | 58.0 | 57.0 | 100.0 | 100.0 | 25.5 | 25.4 | 100.0 | 100.0 | NR | NR |
| Xing, 2008 | 260 | 281 | 59.2 | 59.5 | 66.0 | 62.0 | NR | NR | 48.0 | 55.0 | NR | NR |
| Bonner, 2009 M | 73 | 68 | 54.9 | 54.5 | 100.0 | 100.0 | NR | NR | NR | NR | NR | NR |
| Bonner, 2009 F | 40 | 39 | 54.9 | 54.5 | 0.0 | 0.0 | NR | NR | NR | NR | NR | NR |
| Hosgood, 2010 | 227 | 227 | 58.7 | 58.4 | 100.0 | 100.0 | 25.6 | 26.3 | 100.0 | 100.0 | NR | NR |
| Shen, 2010 | 103 | 103 | 58.0 | 56.0 | 0.0 | 0.0 | 27.8 | 26.4 | 48.5 | 47.6 | 72.8 | 75.8 |
| Liao, 2011 | 162 | 299 | 61.0 | 61.0 | 0.0 | 0.0 | NR | NR | 5.6 | 4.4 | 1.9 | 2.0 |
| Lynch, 2011 | 203 | 656 | 58.0 | 58.0 | 100.0 | 100.0 | 26.2 | 25.7 | 100.0 | 100.0 | NR | NR |
| Qu, 2011 Overall | 58.4 | 58.2 | 52.8 | 52.8 | 23.8 | 23.6 | 39.4 | 32.8 | 13.1 | 11.9 | ||
| Qu, 2011 M | 169 | 169 | 58.4 | 58.2 | 100.0 | 100.0 | 23.8 | 23.6 | 39.4 | 32.8 | 13.1 | 11.9 |
| Qu, 2011 F | 151 | 151 | 58.4 | 58.2 | 0.0 | 0.0 | 23.8 | 23.6 | 39.4 | 32.8 | 13.1 | 11.9 |
| Zhao, 2011 | 274 | 384 | 50.1 | 48.7 | 86.1 | 84.4 | NR | NR | 56.2 | 49.7 | 35.8 | 15.1 |
| Purdue, 2012 | 445 | 379 | NR | NR | 58.0 | 65.0 | NR | NR | 66.0 | 61.0 | NR | NR |
| Purdue, 2012 | 158 | 224 | NR | NR | 69.0 | 49.0 | NR | NR | 71.0 | 69.0 | NR | NR |
| Thyagarajan, 2012 M | 92 | 379 | 66.1 | 57.6 | 100.0 | 100.0 | 23.0 | 22.8 | 42.9 | 26.1 | 23.7 | 19.5 |
| Thyagarajan, 2012 F | 76 | 495 | 66.1 | 57.6 | 0.0 | 0.0 | 23.0 | 22.8 | 42.9 | 26.1 | 23.7 | 19.5 |
| Mondal, 2013 | 124 | 140 | 58.0 | 56.0 | 79.0 | 72.1 | NR | NR | 71.7 | 53.4 | NR | NR |
| Thyagarajan, 2013 | 183 | 529 | 61.1 | 61.1 | 0.0 | 0.0 | NR | NR | NR | NR | NR | NR |
| Xie, 2013 M | 174 | 180 | 58.2 | 58.5 | 100.0 | 100.0 | NR | NR | 37.5 | 35.5 | NR | NR |
| Xie, 2013 F | 151 | 150 | 58.2 | 58.5 | 0.0 | 0.0 | NR | NR | 37.5 | 35.5 | NR | NR |
| Xu, 2013 M | 173 | 173 | 62.1 | 60.9 | 100.0 | 100.0 | NR | NR | 68.8 | 56.0 | NR | NR |
| Xu, 2013 F | 45 | 45 | 62.1 | 60.9 | 0.0 | 0.0 | NR | NR | 68.8 | 56.0 | NR | NR |
| Cheau-Feng, 2014 | 67 | 79 | 56.0 | 59.6 | 100.0 | 100.0 | NR | NR | NR | NR | NR | NR |
| Ghosh, 2014 | 64 | 100 | NR | NR | 76.6 | 79.0 | NR | NR | 67.2 | 26.0 | 68.8 | 49.0 |
| Hofmann, 2014 M | 164 | 231 | NR | NR | 100.0 | 100.0 | NR | NR | 60.0 | 54.7 | NR | NR |
| Hofmann, 2014 F | 67 | 137 | NR | NR | 0.0 | 0.0 | NR | NR | 60.0 | 54.7 | NR | NR |
| Hosnijeh, 2014 | 469 | 469 | 56.6 | 56.6 | 49.3 | 49.3 | 26.9 | 26.6 | 57.9 | 56.3 | NR | NR |
| Huang, 2014 | 444 | 1423 | 58.6 | 55.2 | 0.0 | 0.0 | 24.6 | 24.4 | 2.5 | 3.2 | 3.2 | 2.7 |
| Jiang, 2014 | 506 | 520 | 50.0 | 51.0 | 0.0 | 0.0 | NR | NR | NR | NR | NR | NR |
| Kim, 2014 PLCO M | 57 | 185 | 63.9 | 63.8 | 100.0 | 100.0 | 27.0 | 27.3 | 48.0 | 51.0 | NR | NR |
| Kim, 2014 PLCO F | 38 | 116 | 63.9 | 63.8 | 0.0 | 0.0 | 27.0 | 27.3 | 48.0 | 51.0 | NR | NR |
| Kim, 2014 ATBC | 33 | 97 | 59.3 | 57.6 | 100.0 | 100.0 | 26.1 | 26.4 | 100.0 | 100.0 | NR | NR |
| Kim, 2014 PLCO-M | 259 | 267 | 64.1 | 63.7 | 100.0 | 100.0 | 26.8 | 27.4 | 89.2 | 54.6 | NR | NR |
| Kim, 2014 PLCO-F | 167 | 169 | 64.1 | 63.7 | 0.0 | 0.0 | 26.8 | 27.4 | 89.2 | 54.6 | NR | NR |
| Kim, 2014 SWHS | 221 | 222 | 59.2 | 59.2 | 0.0 | 0.0 | 24.6 | 25.0 | 7.7 | 5.0 | NR | NR |
| Sun, 2014 | 132 | 125 | 58.2 | 55.5 | 56.1 | 52.0 | NR | NR | 41.7 | 65.1 | NR | NR |
| Zhang, 2014 Overall | NR | NR | 58.2 | 58.2 | NR | NR | 23.2 | 20.5 | NR | NR | ||
| Zhang, 2014 M | 241 | 241 | NR | NR | 100.0 | 100.0 | NR | NR | 23.2 | 20.5 | NR | NR |
| Zhang, 2014 F | 173 | 173 | NR | NR | 0.0 | 0.0 | NR | NR | 23.2 | 20.5 | NR | NR |
| Zhou, 2014 | 193 | 194 | 70.3 | 70.1 | 100.0 | 100.0 | 24.1 | 23.2 | 51.8 | 50.5 | NR | NR |
Abbreviations: M, male; F, female; BMI, body mass index; NR, not reported.