• Chronic insomnia linked to 40% higher cognitive impairment risk.
• Study involved 2,750 cognitively unimpaired participants aged 50+.
• Greater decline in cognitive scores observed in patients with chronic insomnia.
• Sleep duration is crucial; reduced sleep correlates with worse cognitive performance.
• No link found between sleep medications and cognitive differences.
• Study controlled for depression, sleep apnea, and other confounders.
• Funded by the NIH and other foundations.
• Importance of perceived sleep duration emphasized.

Source: Neurology