Optic nerve sheath diameter in intracranial hypertension: Measurement external or internal of the dura mater?

With an ICP threshold of ≥22 mmHg, logistic regression yielded an OR of 2.8 (1.4; 5.7, p = .00) for ONSDext and a borderline significant OR of 3.2 (1.0; 10.3, p = .05) for ONSDint.

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Adjusting for ED also yielded a nonsignificant trend toward better AUROCs with ICP threshold set at ≥20 mmHg, for both ONSDext and ONSDint (Tables 2 and 3 ).

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