Sleep difficulties are commonly reported by patients with asthma. However, the prevalence of insomnia and its association with disease burden and well-being is unknown.
We aimed to determine the prevalance of insomnia, defined as combined sleep-specific complaints with associated daytime symptoms, among a large sample of adults with asthma, and to compare well-being, asthma control, and asthma-related healthcare utilization in individuals with asthma and insomnia and those without insomnia.
Baseline data from adults with physician-confirmed asthma enrolled in the Severe Asthma Research Program (SARP) III was used for the analyses (n = 714). Participants completed the Insomnia Severity Index (ISI), Asthma Control Test (ACT), Asthma Quality of Life Questionnaire (AQLQ), and Hospital Anxiety and Depression Scale (HADS).
Insomnia (ISI ≥ 10) was identified in 263 participants (37%). Presence of insomnia was associated with higher levels of depression and anxiety symptoms and poorer quality of life. Those with insomnia had a 2.4-fold increased risk for having not well-controlled asthma and a 1.5-fold increased risk for asthma-related healthcare utilization in the past year compared to those without insomnia.
Insomnia is highly prevalent in asthma and is associated with adverse outcomes. Further studies are needed to gain a better understanding of the interaction between insomnia and asthma control.