Can ultrasound predict the severity of acute pancreatitis early by observing acute fluid collection?

Table 1 AFC and clinical outcome

	0 site	1 site	2 site	> 2 sites	Total
Mild AP	256(51)	91(18.1)	75(14.1)	80(15.9)	502(100)aP
Severe AP	10(8)	13(10.4)	18(14.4)	84(67.2)	125(100)aP
n	263	101	91	144	599
Mean hospital	12.2 ± 6.14	15.8 ± 9.89	19.4 ± 10.13	28.4 ± 19.68	17.8 ± 14.37
stay	bPcPdP	bPePfP	cPePgP	dPfPgP	hP
Local complication	0	22	16	40	78
Operation	0	2	5	33	40
Death	2	2	1	15	20

n: the number of mean hospital stay, exclude dead patients and the patients who discharged themselves without complete cure. Value in parentheses are percentage.

^aP < 0.00001, χ² = 147.78, DF = 3. To analyze the mean hospital stay using Kruskal-wallis test,

^hP < 0.00001, χ² = 161.47, DF = 3; furthermore using Wilcoxon test (l test) to analyze the mean hospital stay between every two group:

^bP < 0.00001, l = 4.09;

^cP < 0.00001, l = 6.69;

^dP < 0.00001;

^eP = 0. 0206, l = 2.32;

^fP < 0.00001, l = 8.02;

^gP < 0.00001, l = 5.07