Table 2.

Descriptive statistics of the median and homogeneous groups of quantity of endotoxin of E. coli (EU/mL) on the first and second collections

Irrigation solution	1st collection EU/mL		2nd collection EU/mL
	Median	Homogeneous groups*	Median	Homogeneous groups*
NaOCl 2.5%	118.5	B	563	B
2% CLX gel	104.9	B	227	B
Pyrogen-free saline solution	444	A	6940	A

^*different letters indicate statistically significant difference (p<0.05)