Table 2.
Univariable HRs for risk of death and SBP development associated with PMN count and percent with AIC values to assess best model fit
| PMN at paracentesis | Risk of death | Risk of SBP development | ||||||
| HR (95% CI) | P | AIC | C-statistic | HR (95% CI) | P | AIC | C-statistic | |
| PMN-C (cells/mm3) | ||||||||
| Per 25 cells/mm3 increase | 1.10 (1.01–1.21) | 0.03 | 1,048 | 0.585 | 1.14 (1.03–1.25) | 0.01 | 756 | 0.630 |
| ≥115 (vs <115) | 2.06 (1.07–3.97) | 0.03 | 1,048 | 0.527 | 2.33 (1.11–4.86) | 0.02 | 757 | 0.533 |
| PMN-% | ||||||||
| Per 10% increase | 1.19 (1.06–1.33) | 0.003 | 1,044 | 0.609 | 1.29 (1.14–1.45) | <0.001 | 747 | 0.655 |
| 3 categories: | 1,039 | 0.618 | 745 | 0.665 | ||||
| <10% | 1.00 | 1.00 | ||||||
| 10%–29% | 1.67 (1.07–2.60) | 0.02 | 1.91 (1.13–3.22) | 0.02 | ||||
| ≥30% | 2.90 (1.93–4.72) | <0.001 | 4.11 (2.20–7.66) | <0.001 | ||||
AIC, Akaike information criterion; CI, confidence interval; HR, hazard ratio; PMN, polymorphonuclear leukocyte; PMN-%, PMN percentage; PMN-C, PMN count; SBP, spontaneous bacterial peritonitis.