Table 2.

Mean values of serum nitrate levels in relation to oesophageal varices grades

Oesophageal varices grade	Number of patients (n = 85)	Mean nitrate ± SD	t	P	ANOVA	P
No oesophageal varices	10	36.6 ± 7.85	–	–	478.16	<0.001*
Small oesophageal varices	43	51.04 ± 11.5	4.43	<0.001*
Large oesophageal varices	32	109.25 ± 3.54	28.72	<0.001*

* Highly significant result