Table 3.

Within group comparison of nitric oxide and metabolites in the depressive disorder group

	Before ECT (n=23)	After first session (n=22)	After seventh session (n=21)	χ 2	P
Nitrite	2.10 (1.80-3.00), 2.94±3.09	2.30 (2.00-3.25), 3.29±2.69	1.90 (1.65-2.32), 1.90±0.47	7.62	0.022
Nitrate	2.70 (2.503.00), 2.75±0.51	2.95 (2.60-3.42), 3.01±0.58	2.70 (2.50-3.30), 2.85±0.89	1.40	0.497
NO	5.20 (4.60-5.80), 5.70±3.00	5.35 (4.87-6.30), 6.31±2.76	4.70 (4.03-4.48), 4.73±0.89	6.12	0.047

P<0.05 is significant. Friedman test. Medians and IQR are reported. Post hoc comparisons were performed with Wilcoxon Sign test. NO – Nitric oxide; ECT – Electroconvulsive therapy; IQR – Interquartile range