Association of Prognostic Nutritional Index With Mortality in High-Risk OSA Individuals and with Disease Severity in Clinical OSA Patients.

BMI showed a positive trend with increasing OSA severity ( P < 0.001).

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In the fully adjusted model, higher PNI was independently associated with lower all-cause mortality, with a significant trend across tertiles.

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For cardiovascular mortality, an overall significant association was detected ( P -overall<0.01), although the test for non-linearity approached but did not reach significance ( P -nonlinear=0.051).

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Although the associations did not reach statistical significance within every individual subgroup, the direction of effect was largely uniform.

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