Non-linear correlation between amylase day 2 to day 1 ratio and incidence of severe acute pancreatitis.

Similarly, patients with a high amylase ratio (≥0.3) had a trend towards higher mortality (7/320, 2.2%) than patients with a low amylase ratio (<0.3) (1/144, 0.7%) during hospitalization, although it did not reach statistical significance (P = 0.445) ( Figure 2 ) .

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