Primary care patients with cardiovascular disease eligible for nurse-led internet-based cognitive behavioural therapy for insomnia: Characteristics and motives for participation.

The study was cross-sectional and did not test the intervention, so it cannot show that internet-based CBT for insomnia improves sleep or that the measured characteristics cause insomnia. The number analysed differed from the number recruited: 181 agreed, 126 completed questionnaires, 48 were eligible for randomisation, 37 were excluded, and 19 were interviewed. The quantitative sample was relatively small, cardiovascular diagnoses were unevenly distributed, and there were more men than women. Most data were self-reported, although insomnia diagnosis was assessed by a sleep physician and cardiovascular diagnosis was recorded in health care. The persona model was based on 19 interviews and its validity has not been widely studied, so the profiles should be treated as descriptive patterns rather than fixed patient types.

The authors declared no conflicts of interest, and funding was listed as not applicable.

Do not read the participant profiles or correlations as proof that nurse-led internet-based CBT for insomnia improves sleep or that these traits cause insomnia. The study measured characteristics and motives before the intervention, used self-report, and did not report treatment outcomes.