For the gallstone AP group, NLR and PLR demonstrated a predictive value significantly superior to that of CRP (NLR-AUC 0.663, 95% CI 0.56–0.77; PLR-AUC 0.638, 95% CI 0.53–0.75; CRP-AUC 0.475, 95% CI 0.35–0.60, Fig. 2b), whereas NLR, PLR, and CRP were not significant for alcoholic AP (NLR-AUC 0.618, 95% CI 0.51–0.72; PLR-AUC 0.446, 95% CI 0.34–0.55; CRP-AUC 0.598, 95% CI 0.49–0.71, Fig. 2c). Here, CRP is linked to alkaline phosphatase measurement.