IMPORTANCE: Sleep-wake disturbances in midlife are common and potentially modifiable contributors to long-term brain health, yet primary care lacks a brief, validated tool that reliably identifies adults with early cognitive vulnerability.
OBJECTIVE: To evaluate associations between commonly used sleep questionnaires and cognitive impairment among midlife primary care patients.
DESIGN SETTING AND PARTICIPANTS: Cross-sectional analysis of baseline data from the MidCog cohort, an observational study of English-speaking adults aged 35 to 64 years receiving primary care at academic practices or federally qualified health centers in the Chicagoland area.
EXPOSURES: Five validated sleep questionnaires were used to assess distinct sleep-wake disturbance phenotypes: (A) unsatisfactory sleep (PROMIS Sleep Disturbance T-score >55), (B) short sleep duration (<6 hours; Munich Chronotype Questionnaire), (C) obstructive sleep apnea (OSA) risk (STOP-Bang ≥3), (D) insomnia symptoms (Insomnia Severity Index ≥15), and (E) poor multidimensional sleep health (RU-SATED ≤6).
MAIN OUTCOMES AND MEASURES: The primary outcome was cognitive impairment defined as an age- and education-adjusted NIH Toolbox Cognition Battery (NIHTB-CB) Fluid Composite T-score <40 (>1 SD below the population mean). Cognitive impairment defined by the Montreal Cognitive Assessment (MoCA) score <23 served as the secondary outcome. Logistic regression estimated adjusted odds ratios (aOR), controlling for age, sex, education, body mass index, hypertension, hypercholesterolemia, diabetes, smoking, depressive symptoms, and recruitment site.
RESULTS: Among 646 participants (mean [SD] age, 52.3 [8.1] years; 62.4% female; 38.0% non-Hispanic Black, 38.4% non-Hispanic White, 16.0% Hispanic), cognitive impairment was present in 18.7% by NIHTB-CB and 22.3% by MoCA. Among five sleep-wake disturbance phenotypes evaluated, only poor multidimensional sleep health was consistently associated with cognitive impairment after multivariable adjustment (NIHTB-CB: adjusted OR [95% CI] = 2.03 [1.25-3.26]; MoCA: 1.98 [1.20-3.26]).
CONCLUSIONS AND RELEVANCE: Poor multidimensional sleep health was associated with cognitive impairment in midlife primary care patients. Brief multidimensional sleep health screening may identify individuals with early cognitive vulnerability and represent a potential strategy for targeting sleep-focused interventions to promote long-term brain health.
KEY POINTS: Among commonly used brief sleep questionnaires, which measure, if any, best identifies midlife primary care patients at risk of early cognitive vulnerability?In this cross-sectional study of 646 primary care patients aged 35-64 years, poor multidimensional sleep health assessed using the RU-SATED questionnaire was the only sleep-wake disturbance phenotype consistently associated with cognitive impairment across two cognitive measures (NIH Toolbox Cognitive Battery and Montreal Cognitive Assessment).Brief multidimensional sleep health screening may help identify midlife adults with sleep-related early cognitive vulnerability in primary care and may represent a potential target for sleep-focused interventions to promote long-term brain health. Question: Findings: Meaning:
