Self-reported sleep quality and depression in post myocardial infarction patients attending cardiology outpatient clinics in Oman.
Rashid Said Saif Almamari, Joshua Kanaabi Muliira, Eilean Rathinasamy Lazarus
PMID 31728388WHAT IT FOUND
Among 180 post-MI patients in Oman, 61.1% self-reported poor sleep, but 82.2% had minimal depressive symptoms.
Regular exercise was associated with better sleep and fewer depressive symptoms; neither sleep nor depression was associated with re-infarction.
Key findings
01The mean global sleep score was 6.95, and 61.1% of patients had poor sleep quality.
02The mean depression score was 5.44, and 82.2% of participants had minimal depressive symptoms; the paper reports 5% had moderate to major depression.
03Self-reported regular exercise was associated with lower sleep-problem scores and lower depression scores, meaning better sleep and fewer depressive symptoms.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
This was a descriptive cross-sectional survey, so it cannot show that exercise caused better sleep or lower depressive symptoms. Sleep and depression were self-reported, and the authors say participants may have over-reported sleep symptoms and under-reported depression symptoms. The PSQI had low reliability in this sample (Cronbach's α 0.642), so the sleep score may be less stable. Only 180 of 289 eligible patients provided data, and the authors describe the sample as small, so findings may not represent all post-MI patients. The study included only patients attending two tertiary cardiology clinics in Oman, and many had no formal education, limiting generalisability.
Declared interests
The authors declared no competing interests, and the study had no funding.
The easy way to misread this
Do not conclude that poor sleep or depression caused re-infarction, or that exercise improved sleep or depression. This was a cross-sectional survey, and neither sleep quality nor depressive symptoms was significantly associated with re-infarction; associations with self-reported exercise cannot show cause.