Review Article
Impact of CYP1A1 Polymorphisms on Susceptibility to Chronic Obstructive Pulmonary Disease: A Meta-Analysis
Table 1
Baseline characteristics of eligible case-control studies.
| First author | Year | Reference | Country | Ethnicity | Source of controls | Matching criteria for controls | Cases/controls | Quality control | Polymorphisms |
| Cheng | 2009 | [27] | China | Asian | PB | Age | 184/212 | NA | MspI, | Gaspar | 2004 | [25] | Brazil | Caucasian | PB | NA | 75/90 | NA | MspI, Ile/Val | Korytina | 2008 | [26] | Russia | Caucasian | PB | Age, sex, ethnicity | 319/418 | NA | MspI, Ile/Val | Putra | 2013 | [29] | Japan | Asian | HB/PB | Sex, ethnicity | 48/172 | Yes | MspI, Ile/Val | Vibhuti | 2010 | [28] | India | Caucasian | HB | Sex, ethnicity, area | 210/136 | NA | MspI, Ile/Val | Wang | 2008 | [31] | China | Asian | HB | Age, sex | 115/94 | NA | Ile/Val | Yang | 2014 | [30] | China | Asian | HB | Age, sex | 101/80 | NA | MspI |
|
|
PB: population-based; HB: hospital-based; HB/PB: recruiting both population-based and hospital-based controls; NA: not available.
|