Table I.

Comparison of survival time following the induction of SAP in rats.

					P-value
Group	n	Median survival time (h)	Interquartile range (h)	Compared with the SAP group	Compared with the IU group	Compared with the SL group
SAP	10	4.83	2.83–8.50
IU	10	6.67	5.50–9.50	0.044a
SL	10	6.17	5.33–8.33	0.370	0.267
LUL	10	8.17	5.25–12.00	0.003b	0.046a	0.011a
MUL	10	9.50	6.25–12.00	0.000b	0.002b	0.000b
HUL	10	8.75	6.00–12.00	0.000b	0.040a	0.001b
UHUL	10	7.67	4.25–11.25	0.015a	0.352	0.034a

^aP<0.05

^bP<0.01. SAP, severe acute pancreatitis; IU, intravenous ulinastatin (2,500 U/100g); SL, saline lavage; LUL, low-dose ulinastatin lavage (25 U/ml); MUL, medium-dose ulinastatin lavage (62.5 U/ml); HUL, high-dose ulinastatin lavage (125 U/ml); UHUL, ultra-high-dose ulinastatin lavage (250 U/ml).