Continuous regional arterial infusion therapy with gabexate mesilate for severe acute pancreatitis

Table 2 Stage classification of acute pancreatitis and mortality rate in 2003 in Japan[4]

Stage	Severity score	Severity	No. of patients(%)	Died	Mortality rate (%)
Stage 0	0 point	Mild	943 (53.3)	1	0.1
Stage 1	1 point	Moderate	280 (15.8)	2	0.7
Stage 2	2-8 points	Severe I	455 (25.7)	17	3.7
Stage 3	9-14 points	Severe II	63 (3.6)	16	25.4
Stage 4	≥ 15 points	Most severe	27 (1.5)	16	59.3
Total			1786 (100)	52	2.9

In 2004, nationwide survey of patients with acute pancreatitis in Japan who visited the hospitals in the year 2003 (from January 1 to December 31) was performed by stratified random sampling method. From the first survey, the total number of patients treated for acute pancreatitis in Japan in the year 2003 was estimated as 35 300 (95% confidence interval, 30 500-40 000). Clinical records of 1768 patients with acute pancreatitis were obtained in the second survey for analysis of etiology and outcome. Number of patients who died of acute pancreatitis or related complications.