Table 1. Comparison of the Means Score Values and Standard Deviations of Different Root Canal Areas in Each Group .

Groups	Areas	Mean Score	SD	P Value a
Control	Coronal	1.37	0.49	0.02
	Middle	1.67	0.66
	Apical	1.87	0.82
1% NaOCl LAI	Coronal	2.87	0.9	0.001
	Middle	3.50	0.82
	Apical	3.70	0.84
2.5% NaOCl LAI	Coronal	2.27	0.98	<0.001
	Middle	3.73	1.17
	Apical	4.23	0.57
5% NaOCl LAI	Coronal	1.93	0.78	0.001
	Middle	2.70	0.99
	Apical	2.83	1.09

Abbreviation: SD, standard deviation.

^aKruskal–Wallis tests.