Table 2.

Baseline characteristics of included studies

Study	Year	Eligible subjects (case/control)	Age (years)		Populations		Method	Outcome
			Case	Control	Case	Control
Jiao et al. [15]	2007	118/225	61.8 ± 11.4	60.4 ± 12.7	CAD patients had at least 30% stenos is determined angiographically in at least one of the major segments of coronary arteries, the right coronary artery, left circumflex, or left anterior descending arteries.	Hospital-based	PCR-RFLP	TC,TG, HDL-C, LDL-C
Zhao et al. [21]	2011	314/389	64.43 ± 8.48	63.93 ± 6.86	Ischemic stroke patients included having a sudden loss of global or focal cerebral function, and corresponding infarction confirmed by brain imaging with a computed tomography scan and/or magnetic resonance imaging.	Hospital-based	PCR, SNaPshot	TC,TG, HDL-C, LDL-C
Zheng et al. [22]	2009	126/118	62.5 ±9.4	63.0 ±10.8	Patients that diagnosed as CAD according to the results of angiography (a lesion was classed as being significant when stenosis was >50%).	Hospital-based	real-time PCR	TC,TG, HDL-C, LDL-C, )
Niu et al. [18]	2006	170/156	55.5 ± 13.2	56.2 ± 9.7	T2D patients were diagnosed according to the criteria of the World Health Organization (1999).	Hospital-based	PCR-RFLP	TC, TG
Wu et al. [20]	2009	117/316	22.8 ± 14.5	63.1 ± 9.7	T1D patients were diagnosed according to the criteria of the World Health Organization (1999) with positive of anti-islet antibodies result in inability to produce insulin.	Hospital-based	PCR-RFLP	TC, TG
Mo et al. [17]	2011	-/430	-	-	-	Community-based and hospital staff	PCR-RFLP	TC,TG, HDL-C, LDL-C,
Huang et al. [14]	2009	220/195	64.3 ± 11.1	59.0 ± 10.1	Patients that diagnosed as CAD according to the results of clinical symptoms, angiography, electrocardiogram and echocardiography.	Hospital-based	PCR-RFLP	TC, TG
Wang et al. [19]	2009	45/60	51.4 ± 6.2	52.6 ± 8.6	Patients diagnosed of CAD based on the criteria of the World Health Organization (1979).	Hospital-based	PCR-RFLP	TC,TG, LDL-C
Zhang et al. [23]	2012	675/636	56.4 ± 9.9	55.8 ± 10.4	Patients diagnosed of CAD based on the criteria of the World Health Organization (1979).	Community-based and hospital staff	PCR-RFLP	-
Ma et al. [16]	2011	112/168	57.9 ± 10.2	56.2 ±9.4	Patients that diagnosed as CAD according to the results of angiography (≥50% stenos in at least one of the major segments of coronary arteries).	Hospital-based	Allele-specific PCR	TC,TG, HDL-C, LDL-C

CAD Coronary artery disease, T2D Type 2 diabetes mellitus, T1D Type 1 diabetes mellitus, PCR Polymerase chain reaction, RFLP Restriction fragment length polymorphism, TC Total cholesterol, TG Triglycerides, HDL-C High-density lipoprotein cholesterol, LDL-C Low-density lipoprotein cholesterol.