Geriatric nutritional risk index as a predictor of 30-day and 365-day mortality in patients with acute myocardial infarction: a retrospective cohort study using the MIMIC-IV database.

The p -value for the trend analysis indicated statistical significance for 365-day mortality ( p = 0.002), whereas it did not reach statistical significance for 30-day mortality ( p = 0.266; Table 2 ). 3.5.

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As the GNRI value increases, mortality showed a decreasing trend ( Figure 3 ). 3.4.

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However, when comparing high versus low GNRI levels during this later time window, the HR was 0.383 (95% CI: 0.140–1.044, p = 0.065), suggesting a trend toward lower mortality among patients with better nutritional status that did not quite reach statistical significance ( Table 5 ). 3.7.

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