Table 1

		GROUPS						p value^a
Parameter	Score	Group 1 Control	Group 2a Paracetamol	Group 3 ERD Treatment	Group 4 NAC Treatment	Group 5 NAC Control	Group 6 ERD Control	p value^a
Parameter	Score	n	n	n	n	n	n
Degenerationb	None	0	0	0	0	0	0	<0.01
	Mild	3	1	2	5	5	5
	Moderate	2	4	3	0	0	0
	Severe	0	0	0	0	0	0
Edema^b	None	0	0	0	4	3	5	<0.001
	Mild	5	3	5	1	2	0
	Moderate	0	2	0	0	0	0
	Severe	0	0	0	0	0	0
Vascular Congestion^c	None	0	3	0	4	3	5	=0.006
	Mild	3	2	5	0	2	0
	Moderate	2	0	0	1	0	0
	Severe	0	0	0	0	0	0
Total	None	5	5	5	5	5	30

NAC: N-acetyl cysteine; ERD: erdosteine
^aComparing of Group 2 vs. other groups; statistically significant difference in degeneration and edema, and vascular congestion effects (p<0.01)
^bComparing of Group 3 vs. Group 4; no statistically significant difference in degeneration and edema effects (p>0.05)
^cComparing of Group 3 vs. Group 4; statistically significant difference in vascular congestion effect (p<0.005)

Table 1: The results of histological examination of rat hippocampal tissues