The Japanese version of the Richards-Campbell Sleep Questionnaire: Reliability and validity assessment.
Hiroaki Murata, Yoko Oono, Masamitsu Sanui and 5 others
PMID 31367403WHAT IT FOUND
A Japanese five-question sleep survey agreed moderately with objective sleep measures in non-ventilated ICU patients, but sleep depth and awakening questions did not.
Use it for bedside screening in lucid patients, not as a full sleep study.
Key findings
01The total score was associated with objective sleep efficiency: r = 0.459, p = 0.007; after excluding four patients with subsyndromal delirium, r = 0.602, p = 0.001.
02The Japanese questionnaire had a reliability value of 0.911.
03Sleep depth and awakening did not correlate with objective sleep measures.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Only 33 patients were analysed after 5 declined and 7 were excluded because electrodes came off. The sample was small and had varied backgrounds, medications and ongoing disorders. Mean APACHE-II was 12.4, and intubated patients were excluded, so the sample was less severely ill than many ICU patients. The study was done in a Japanese university hospital ICU, so it does not test the questionnaire outside this setting. Four patients had subsyndromal delirium, and excluding them changed the total-score association. The study did not test the questionnaire against patient severity scores in a multivariate analysis. Sleep depth and awakening items did not correlate with objective sleep measures.
Declared interests
The authors declared no conflict of interest.
The easy way to misread this
Do not read the total-score association as proof that the questionnaire works for every ICU patient. It was tested in 33 non-ventilated Japanese ICU patients, including four with subsyndromal delirium, and sleep depth and awakening items did not correlate with objective sleep measures.