Table 1.

Characteristics of the case-control studies included in meta-analysis.

First author/reference	Year	Country	Ethnicity	Age group	Atopic status	Case (n)	Control (n)	Quality score	Genotyping method
Hákonarson [11]	2001	Iceland	Caucasian	Mixed	Atopic	94	94	10	PCR
Liu [20]	2004	China	Asian	Adult	NA	100	100	4	PCR-RFLP
Donfack 1 [12]	2005	USA	Caucasian	NA	Mixed	126	205	9	LAS
Donfack 2 [12]	2005	USA	African American	NA	Mixed	205	183	9	LAS
Battle [21]	2007	USA	African American	Mixed	NA	264	176	11	PCR-RFLP
Daley [22]	2009	Australia	Caucasian	Mixed	NA	644	751	9	Illumina Bead Array System
Wu [23]	2010	China	Asian	Children	NA	252	227	6	PCR-RFLP
Moffatt [13]	2010	Mixed	Caucasian	Mixed	NA	10365	16110	12	Illumina Human610 quad array
Li [14]	2010	USA	Caucasian	Adult	NA	473	1892	12	Illumina HumanCNV370 BeadChip
Noguchi [24]	2011	Japan	Asian	Children	Mixed	938	2376	12	Illumina HumanHap550v3/610-Quad Genotyping BeadChip
Yoon 1 [25]	2012	Korea	Asian	Adult	NA	193	8645	9	Affymetrix Genome-Wide Human SNP array 5.0
Yoon 2 [25]	2012	Korea	Asian	Adult	NA	44	7450	9	Affymetrix Genome-Wide Human SNP array 5.0

PCR: polymerase chain reaction; RFLP: restriction fragment length polymorphism; LAS: multiplex PCR and an immobilized linear array system; NA: not available.