Abstract
AimsThe purpose of this study was to determine the reliability and validity of the Japanese version of the Richards‐Campbell Sleep Questionnaire as a measure of sleep among intensive care unit patients in a Japanese hospital.DesignCross‐sectional survey.MethodsThe Richards‐Campbell Sleep Questionnaire was initially translated into Japanese using the back‐translation method. Validity was evaluated by determining the association between sleep efficiency, measured using simplified polysomnography, and the total score on the Japanese version of the Richards‐Campbell Sleep Questionnaire. Adult non‐intubated intensive care unit patients who completed the five‐item visual analogue scale underwent polysomnography for one night. Reliability was tested using Cronbach's alpha coefficient.ResultsThirty‐three patients were included in the analysis. After excluding four patients with subsyndromal delirium, the Pearson correlation coefficient was 0.602 (p = 0.001). Cronbach's alpha coefficient was 0.911.ConclusionThe Japanese version of the Richards‐Campbell Sleep Questionnaire could be used as an alternative to polysomnography when assessing sleep quality in lucid intensive care unit patients.
Highlights
The quality of sleep is impaired in critically ill patients (Friese, 2008; Murata & Yamaguchi, 2018; Richards, O'Sullivan, & Phillips, 2000)
The sleep disorders cannot be ignored by nurses of intensive care unit (ICU)
The correlation for the original Richards‐Campbell Sleep Questionnaire (RCSQ) and PSG was 0.58. These results suggest that the Japanese version of the RCSQ (J‐RCSQ) is as valid and reli‐ able for the evaluation of sleep in non‐intubated, non‐delirious Japanese patients admitted in the ICU, as the original version for American patients
Summary
The quality of sleep is impaired in critically ill patients (Friese, 2008; Murata & Yamaguchi, 2018; Richards, O'Sullivan, & Phillips, 2000). The advantages of measuring sleep quality using these questionnaires, bed‐side nurses and researchers could know patient's perception of night‐time sleep in a timely manner. These questionnaires with the exception of the RCSQ have some disadvantages: They have from 15–27 items. These instruments measure the quality of night‐time sleep before hospitalization. It is not easy for critically ill patients to answer the items. This study aimed to determine the reliability and validity of the Japanese version of The RCSQ as a measure of sleep among ICU patients in a Japanese hospital
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