AIP and acute kidney injury: When AIP was below 1.333, it was positively associated with AKI risk (OR = 1.329, 95% CI: 1.03–1.713, p = 0.028), whereas AIP levels above 1.333 were inversely associated with AKI risk (OR = 0.719, 95% CI: 0.551–0.948, p = 0.017).