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Table 1 Main characteristics of all eligible studies in this meta-analysis

From: Association between risk of asthma and gene polymorphisms in CHI3L1 and CHIA: a systematic meta-analysis

Author

Year

Country

Ethnicity

Age group

Cases

Controls

Genotyping method

rs4950928

 Li [21]

2015

China

Asian

Children

316

297

Mass Array

 James [7]

2016

Sweden

Caucasian

Adults

111

57

TaqMan

 Ober [18]

2008

USA

Caucasian

Children

344

294

TaqMan

 Ober [18]

2008

USA

Caucasian

Mixed

99

197

TaqMan

 Ramphul [20]

2015

Mauritius

African

Children

192

189

TaqMan

rs10494132

 Chatterjee [8]

2008

India

Caucasian

Adults

270

292

EMSAs

 Chatterjee [8]

2008

India

Caucasian

Adults

150

101

EMSAs

 Huang [23]

2013

China

Asian

Children

158

198

Mass Array

 Chen [22]

2014

China

Asian

Adults

150

101

Mass Array

 Shao [24]

2017

China

Asian

Children

68

52

Mass Array

  1. NA Not available, EMSAs Electrophoretic mobility shift assays