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J Clin Sleep Med. 2012 Jun 15;8(3):301-7. doi: 10.5664/jcsm.1920.

Factors affecting sleep quality of patients in intensive care unit.

Author information

1
Department of Intensive and Critical Care Medicine, Flinders Medical Centre, Bedford Park South Australia, Australia.

Abstract

INTRODUCTION:

Sleep disturbance is a frequently overlooked complication of intensive care unit (ICU) stay.

AIM:

To evaluate sleep quality among patients admitted to ICU and investigate environmental and non-environmental factors that affect sleep quality in ICU.

METHODS:

Over a 22-month period, we consecutively recruited patients who spent ≥ 2 nights post-endotracheal extubation in ICU and who were orientated to time, place, and person on the day of discharge. Self-reported sleep quality, according to a modified Freedman questionnaire, which provided data on self-reported ICU sleep quality in ICU and environmental factors affecting sleep quality in the ICU, were collected. We also investigated non-environmental factors, such as severity of illness, ICU interventions, and medications that can affect sleep quality.

RESULTS:

Fifty males and 50 females were recruited with a mean (± SD) age of 65.1 ± 15.2 years. APACHE II score at admission to ICU was 18.1 ± 7.5 with duration of stay 6.7 ± 6.5days. Self-reported sleep quality score at home (1 = worst; 10 = best) was 7.0 ± 2.2; this decreased to 4.0 ± 1.7 during their stay in ICU (p < 0.001). In multivariate analysis with APACHE III as severity of illness (R(2) = 0.25), factors [exp(b)(95% CI), p value] which significantly affected sleep in ICU were sex [0.37(0.19-0.72), p < 0.01], age and sex interaction [1.02(1.01-1.03), p < 0.01], bedside phone [0.92(0.87-0.97), p < 0.01], prior quality of sleep at home [1.30(1.05-1.62), p = 0.02], and use of steroids [0.82(0.69-0.98), p = 0.03] during the stay in ICU.

CONCLUSION:

Reduced sleep quality is a common problem in ICU with a multifactorial etiology.

KEYWORDS:

Intensive care unit; factors affecting sleep; sleep quality; sleep questionnaire

PMID:
22701388
PMCID:
PMC3365089
DOI:
10.5664/jcsm.1920
[Indexed for MEDLINE]
Free PMC Article
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