Do emotional distress and functional problems in persons with traumatic brain injury contribute to perceived sleep-related impairment in caregivers?

Only 52 dyads were analysed, and the civilian and service member/veteran subsamples were too small for detailed group-specific models. The study was cross-sectional, so it cannot show that patient problems caused caregiver sleep problems. Caregiver sleep was measured only by self-report, with no objective sleep test such as polysomnography or actigraphy. Sleep was not assessed in the person with TBI, even though caregiver and care recipient sleep may affect each other. The within-group regression findings were post hoc and relied on effect sizes rather than statistical significance. The civilian and service member/veteran groups differed in caregiver age, gender, and relationship to the care recipient. This makes it hard to know why the patterns differed. Injury severity was poorly documented for the service member/veteran group, and inclusion criteria differed between groups. The sample was mostly White and female, so results may not apply to other caregivers. The study did not measure caregiver emotional distress, caregiver functional status, or whether the dyad slept in the same room.

Do not conclude that a patient’s anger, thinking, or arm function causes caregiver sleep impairment. These were cross-sectional associations in a small sample, and the within-group analyses were post hoc with effect sizes prioritized over statistical significance.