Interleukin-10 gene polymorphisms and hepatocellular carcinoma susceptibility: A meta-analysis

Table 1 Characteristics of studies included in the meta-analysis

Authors	Year	Design	Country	Ethnicity	No. of case	No. of control	Genotyping methods	Matching criteria
Bouzgarrou et al[23]	2009	HCC	Tunisia	African	58	145	AS-PCR	Age, sex, geographical area
Ognjanovic et al[24]	2009	PCC	United States	Caucasian	120	230	Taqman	Age, sex, race
Tseng et al[25]	2006	HCC	Taiwan, China	Asian	208	528	PCR-RFLP	Race
Migita et al[26]	2005	HCC	Japan	Asian	48	188	PCR-SSP	-
Nieters et al[27]	2005	HCC	China	Asian	250	250	AS-PCR	Age, sex, race, district of residence
Heneghan et al[28]	2003	HCC	China	Asian	98	175	-	Age, sex
Shin et al[29]	2003	HCC	Korea	Asian	230	792	MAPA	-

HCC: Hospital-based case-control; PCC: Population-based case-control; PCR-RFLP: Polymerase chain reaction-restriction fragment length polymorphism; PCR-SSP: Polymerase chain reaction and sequence-specific primer typing; AS-PCR: Allele-specific polymerase chain reaction; MAPA: Multiplex automated primer extension analysis.