Development of a slovenian version of the pittsburgh sleep quality index (PSQI-SLO) for use with older adults.
Sergej Kmetec, Zvonka Fekonja, Adam Davey and 2 others
PMID 34370894WHAT IT FOUND
A Slovenian sleep questionnaire for older adults was easy to complete and gave stable answers over six months, but its questions did not all track the same sleep problem strongly.
Key findings
01The Slovenian version was completed in about 10 minutes, and all items were retained after expert review.
02The whole questionnaire's internal consistency value was 0.67, which the paper calls adequate, and each component correlated with the total score from 0.22 to 0.64.
03When participants answered again after six months, the global score had an intraclass correlation of 0.62, and higher global scores (poor sleep quality) were significantly correlated with older age (r=0.16) and number of chronic diseases (r=0.33).
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The study did not compare the questionnaire with polysomnography or detailed medication and therapy information, so it cannot show that PSQI-SLO diagnoses sleep disorders or explains why sleep is poor. Participants were recruited by convenience sampling, and the response rate was 41.6%, so the sample may not represent all older adults. The sample was 66.5% female, and the paper notes possible gender bias for women. Content validity was judged by 10 nurses, and the scale-level average was 0.70, while the paper states a good value is above 0.90. The whole questionnaire's internal consistency was 0.67 in the results, but the Discussion reports 0.74. The paper describes test-retest reliability as high and above 0.7, but the reported global score value is 0.62.
Declared interests
The authors declared no potential conflicts of interest. The supplied text does not state a funding source.
The easy way to misread this
Do not read this as evidence that treating poor sleep improves older adults' health. It validates how a questionnaire performs in Slovenian older adults, not a treatment effect. Do not use PSQI-SLO alone to diagnose sleep disorders, because the paper notes PSQI is not useful as a diagnostic instrument for polysomnography-defined sleep disorders.