Insomnia and Daily Function in Older Adults With Asthma.
Faith S Luyster, Xiaojun Shi, Lynn M Baniak and 3 others
PMID 33095890WHAT IT FOUND
In older adults with asthma, insomnia alone was not linked to daily activity limits after adjustment. 40% had insomnia, and insomnia plus moderate to severe depressive symptoms was more likely to co-occur with limits.
Key findings
0140% (112) of the study sample were classified as having insomnia.
02After adjustment for demographics, BMI and depressive symptoms, insomnia alone was not linked to having at least two ADL or IADL limitations.
03Participants with both insomnia and moderate to severe depressive symptoms were more likely to report having at least two ADL or IADL limitations than those with insomnia only (27% versus 7%) or depressive symptoms only (9%).
STILL TO COME
How it was doneWhat they foundWhat it means for OTsWhat it means for RNs
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What it does not show
The study is cross-sectional, so it cannot show that insomnia caused or worsened daily function limitations. Asthma control and lung function were not measured, so the null adjusted association with insomnia could be confounded by how well asthma was controlled. Insomnia, sleep apnea and depression were based on self-report or questionnaire items, not clinical examination or objective sleep testing. The ADL and IADL questions may not have captured all functional limitations relevant to older adults with asthma.
The easy way to misread this
Do not conclude that insomnia alone causes daily activity limitations. The adjusted association was not significant, and the study is cross-sectional, so it cannot show cause.