Drug-eluting stents or coronary artery bypass grafting for unprotected left main coronary artery disease: a meta-analysis of four randomized trials and seventeen observational studies

Table 2 Baseline clinical characteristics

Characteristic	PCI	CABG	P(χ ²)
Number	3682	4731
Female/Sample size	756/2644	862/3725	<0.001
Hypertension/Sample size	1759/2858	2529/4008	0.190
Current smoking/Sample size	893/2763	1306/3804	0.088
Hyperlipidemia/Sample size	1341/2809	1903/3771	0.029
Diabetes mellitus/Sample size	959/2858	1374/4009	0.536
Previous myocardial infarction/Sample size	320/2537	522/3401	0.003
Previous stroke/Sample size	204/1882	254/2376	0.876
Previous PCI/Sample size	415/2022	379/2809	<0.001
CRF/Sample size	156/2614	237/3465	0.171
RCA/Sample size	1009/1941	1699/2509	<0.001

Comparison of preoperative variable in DES and CABG patients. All variables come from the individual studies included. RCA: Right coronary artery; CRF: Chronic renal failure.

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