Research Article: A clinical study on the application of new inflammatory markers SII, SIRI, AISI, and MII in the identification of severe acute pancreatitis
Abstract:
Acute pancreatitis (AP) is an inflammatory disease characterized by sudden onset. The mortality rate increases significantly if it progresses to severe acute pancreatitis (SAP). Current clinical scoring systems are complex. Consequently, there is a clinical need for novel inflammatory markers that are inexpensive, fast, accurate, and easy to use. Herein, we aimed to evaluate the clinical value of the following novel inflammatory markers for predicting SAP at admission and assessing AP severity at 48?h after admission: the systemic immune-inflammation index (SII), systemic inflammatory response index (SIRI), aggregate index of systemic inflammation (AISI), multi-inflammatory index-I (MII-1), multi-inflammatory index-II (MII-2), multi-inflammatory index-III (MII-3).
A retrospective analysis was conducted on 374 patients with AP hospitalized at Shijiazhuang People's Hospital, including 58 cases in the severe group and 316 cases in the non-severe group. Receiver operating characteristic curve analysis and pairwise DeLong tests were used to compare marker performance. Separate multivariable logistic regression models were constructed for each inflammatory marker with adjustment for clinical factors. Internal validation of the adjusted models was performed using 2,000 bootstrap resamples.
The SII, SIRI, AISI, MII-1, MII-2, and MII-3 emerged as statistically significant ( P <?0.05) indicators of AP severity. At admission, the overall predictive performance of the inflammatory markers for SAP was relatively limited, with AUCs ranging from 0.589 to 0.694; SII showed the highest AUC of 0.694. At 48?h after admission, MII-1, MII-2, and MII-3 showed moderate-to-good discriminatory performance for assessing AP severity, with AUCs of 0.790, 0.778, and 0.780, respectively. After adjustment for clinical factors, all three MII indices remained significantly associated with SAP. The adjusted MII-1, MII-2, and MII-3 models yielded apparent AUCs of 0.819, 0.807, and 0.804 at 48?h after admission, with optimism-corrected AUCs of 0.800, 0.786, and 0.783.
MII-1, MII-2, and MII-3 showed moderate-to-good discriminatory performance for assessing AP severity at 48?h after admission, particularly MII-1, and their associations with SAP remained significant after adjustment for clinical factors. These findings should be considered exploratory and hypothesis-generating, and further studies are needed to validate the potential value of MII indices in AP severity assessment.
Introduction:
Acute pancreatitis (AP) is an inflammatory disease characterized by sudden onset. The mortality rate increases significantly if it progresses to severe acute pancreatitis (SAP). Current clinical scoring systems are complex. Consequently, there is a clinical need for novel inflammatory markers that are inexpensive, fast, accurate, and easy to use. Herein, we aimed to evaluate the clinical value of the following novel inflammatory markers for predicting SAP at admission and assessing AP severity at 48?h after…
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