Table 3.
Prognostic value of BISAP score and serum markers for predicting SAP.
| Cut off value | SE | SP | AUC | P | PPV | NPV | LR+ | LR− | |
| BISAP | >2 | 61% | 88% | 0.77 | <.0001 | 32% | 94% | 5 | 0.4 |
| Creatinine | >1.1 | 61% | 84% | 0.74 | <.0001 | 33% | 94% | 3.8 | 0.4 |
| Creatinine48h | >1.4 | 60% | 91% | 0.79 | <.0001 | 47% | 94% | 6.6 | 0.4 |
| Ht | <37.1 | 38% | 81% | 0.54 | .54 | 21% | 90% | 2 | 0.7 |
| Ht48h | <35.2 | 59% | 77% | 0.64 | .04 | 25% | 93% | 2.5 | 0.5 |
| CRP48h | >217 | 71% | 88% | 0.8 | <.0001 | 44% | 91% | 5.9 | 0.3 |
| NLR | >9.6 | 65% | 70% | 0.68 | .002 | 22% | 83% | 2.1 | 0.5 |
| NLR48h | >6.15 | 100% | 63% | 0.83 | <.0001 | 26% | 100% | 2.7 | 0 |
| RDW | >13.6 | 45% | 75% | 0.58 | .2 | 19% | 85% | 1.8 | 0.7 |
| BUN | >56 | 53% | 89% | 0.73 | .0002 | 39% | 88% | 4.8 | 0.5 |
| BUN48h | >47 | 78% | 80% | 0.79 | <.0001 | 34% | 96% | 3.9 | 0.2 |
| PLR | >157 | 69% | 53% | 0.59 | .15 | 16% | 92% | 1.4 | 0.5 |
| PLR48h | >92.6 | 100% | 25% | 0.64 | .02 | 15% | 92% | 1.3 | 0 |
| Blood glucose level | >176 | 53% | 82% | 0.67 | .003 | 28% | 92% | 2.9 | 0.5 |
AUC = area under the curve, BUN = blood urea nitrogen, CRP = C-reactive protein, Ht = hematocrit, LR+ = positive likelihood, LR− = negative likelihood, NLR = neutrophil-to-lymphocyte ratio, NPV = negative predictive value, PLR = platelet-to-lymphocyte ratio, PPV = positive predictive value, RDW = red cell distribution width, SE = sensibility, SP = specificity.