In contrast, elderly patients with CRF in uremic phase in the present study usually faced multiple complications and declining physical functions and may have lower tolerance to environmental noise; therefore, the improvement in sleep quality in elderly patients with CRF in uremic phase may be significant after reducing environmental noise.
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Retrospective Study on the Value of Intensive Care Unit Noise Reduction Management in Elderly Patients with Chronic Renal Failure in the Uremic Phase.
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Therefore, the improvement in sleep quality for all patients may not be significant even if the ambient noise in the ICU is continuously reduced.