Association between sleep quality, anxiety and depression among Korean breast cancer survivors.
Ok-Hee Cho, Kyung-Hye Hwang
PMID 34482659WHAT IT FOUND
72.2% of breast cancer survivors were poor sleepers.
Daytime dysfunction and not feeling refreshed on waking were sleep factors associated with anxiety and depression.
Key findings
0172.2% were poor sleepers, and the Pittsburgh Sleep Quality Index score was 8.04.
02The anxiety score was 6.89 out of 21 points, and 15.0% had moderate anxiety; the depression score was 6.60 out of 21 points, and 15.8% had moderate depression.
03Daytime dysfunction was the strongest sleep-quality factor linked with anxiety, and feeling refreshed on waking was the strongest sleep-quality factor linked with depression.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
Participants were recruited from breast cancer self-help groups using convenience sampling, so results may not apply to all breast cancer survivors. The survey was cross-sectional, so it cannot show whether poor sleep caused anxiety or depression, or vice versa. The study did not examine differences according to combination therapy or fatigue level. It excluded people with mental illness or communication difficulty, so survivors with those conditions are not represented.
The easy way to misread this
Do not conclude that treating sleep problems will reduce anxiety or depression. This was a cross-sectional survey of self-reported symptoms, and it could not establish cause and effect.