Blood Urea Nitrogen as a Predictor of Severe Acute Pancreatitis Based on the Revised Atlanta Criteria: Timing of Measurement and Cutoff Points

Table 4

Index of BUN diagnosis for IHM at initial patient admission in the hospital.

BUN (mmol/L)	BUN (mg/dL)	Youden Index	Sensitivity	Specificity	PPV	NPV
5	14	0.538	1	0.538	0.035	1
5.2	14.6	0.609	1	0.609	0.041	1
6	17	0.454	0.727	0.727	0.043	0.991
7	20	0.462	0.636	0.826	0.058	0.993
8	22	0.513	0.636	0.877	0.077	0.993
9	25	0.457	0.546	0.911	0.079	0.992
10	28	0.478	0.546	0.932	0.117	0.969
11	31	0.411	0.455	0.956	0.148	0.991
12	34	0.419	0.455	0.964	0.172	0.990
13.3	37.3	0.426	0.455	0.971	0.217	0.991
13.9	38.9	0.337	0.364	0.973	0.190	0.989

PPV = positive predictive value; NPV = negative predictive value.