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

Table 5

Index of BUN diagnosis for IHM, after 24 hrs of patient hospitalization.

BUN (mmol/L)	BUN (mg/dL)	Youden Index	Sensitivity	Specificity	PPV	NPV
8	22	0.592	0.727	0.865	0.082	0.995
8.3	23.2	0.616	0.727	0.889	0.099	0.995
9	25	0.541	0.636	0.905	0.104	0.993
10	28	0.566	0.636	0.930	0.132	0.994
11	31	0.582	0.636	0.946	0.163	0.994
12	34	0.508	0.546	0.962	0.205	0.989
13.9	38.9	0.335	0.364	0.971	0.174	0.989
15	42.0	0.247	0.273	0.974	0.150	0.988

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