Table 2. Parametric and nonparametric correlations between number of slow flow vessels and study variables .

Number of slow flow vessels (0 to 3)	Age	EF	Smoking history	Opium consumption history	DM	HTN	Chest pain history	HLP
Correlation coefficient	0.087	0.053	0.018	0.119	0.101	0.128	0.250	0.110
P value	0.248	0.486	0.811	0.113	0.181	0.089	0.001*	0.145

Abbreviations: EF, ejection fraction; DM, diabetes mellitus; HTN, hypertension; HLP, hyperlipidemia.

Pearson for Age and EF, and Spearman’s rho for others variables, 0: Normal flow, 3: slow blood flow in all three vessels.