COHb in the study group   r value p value Statistical significance MDA -0.12 0.234 p>0.05  (NS) BNP 0 .40 0.00 p<0.00** (HS) SOD -0.35 0.001 p<0.001**(HS) NO 0.16 0.115 p>0.05  (NS) cTnI -0.27 0.854 p>0.05  (NS) (NS) = non significant,** (HS) = highly significant

Table 8: Pearson correlation coefficient between COHb levels and different laboratory parameters in the study group.