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
YearReferenceCountryEthnicitySource of controlsMatching criteria
for controls
Cases/controlsQuality controlPolymorphisms

Cheng2009[27]ChinaAsianPBAge184/212NAMspI,
Gaspar2004[25]Brazil CaucasianPBNA75/90NAMspI, Ile/Val
Korytina2008[26]RussiaCaucasianPBAge, sex, ethnicity319/418NAMspI, Ile/Val
Putra2013[29]JapanAsianHB/PBSex, ethnicity48/172YesMspI, Ile/Val
Vibhuti2010[28]IndiaCaucasianHBSex, ethnicity, area210/136NAMspI, Ile/Val
Wang2008[31]ChinaAsianHBAge, sex115/94NAIle/Val
Yang2014[30]ChinaAsianHBAge, sex101/80NAMspI

PB: population-based; HB: hospital-based; HB/PB: recruiting both population-based and hospital-based controls; NA: not available.