Relationship between the cytotoxin-associated gene-A status of H pylori strains and cerebral infarction in European Caucasians and Chinese Han: A meta-analysis

Table 1 Characteristics of the studies included in the meta-analysis

Author	CagA-bearing strains		CagA-negative strains		Detection method	Race	Multivariate adjustment	Publication year
	In case	In control	In case	In control
Li[9]	38/83	14/71	34/83	26/71	ELISA	Chinese Han	Age, sex, main risk factors1, cardiogenic factors, occupation	2001
Wang[8]	28/79	11/73	32/79	28/73	ELISA	Chinese Han	Age, sex, main risk factors1, cardiogenic factors, hypercoagulable states	2004
Liu[10]	21/50	19/50	15/50	18/50	ELISA	Chinese Han	Age, sex, main risk factors1, occupation	2003
Sun[12]	47/102	13/72	43/102	18/72	ELISA	Chinese Han	Age, sex, main risk factors1, cardiogenic factors, family history, education	2006
Wu[13]	41/78	21/60	19/78	25/60	ELISA	Chinese Han	Age, sex, main risk factors1, drinking	2003
Wang[11]	62/100	19/50	9/100	15/50	ELISA	Chinese Han	Age, sex, main risk	2006
Preusch[14]	34/92	45/229	34/92	82/229	ELISA	German Caucasian	Age, sex, main risk factors, occupation, family and past history, cardiogenic factors, social class	2004
Gabrielli[15]	44/105	30/130	31/105	51/130	ELISA	Italian Caucasian	Age, sex, main risk factors1, BMI, family history, occupation, peptic ulcer,	2004
Pietroiusti[16]	59/138	27/151	36/138	79/151	ELISA	Italian Caucasian	Age, sex, main risk factors1, BMI, social class, peptic diseases, occupation	2002
Majka[17]	46/80	27/80	23/80	27/80	ELISA	Polish Caucasian	Age, sex, diabetes, hypertension, social class	2002

¹Main risk factors: Cigarette smoking, hypertension, diabetes, hyperlipidemia.