Sleep Duration Tied to Cognitive Decline

Global cognitive function declined faster in people with either very short or very long sleep duration than in people who slept 7 hours a night, combined data from England and China showed.

Over 100,000 person-years of follow-up, cognitive z scores had a pooled β of -0.022 (95% CI -0.035 to -0.009 SD per year) with 4 or fewer hours of sleep a night and a pooled β of -0.033 (95% CI -0.054 to -0.011 SD per year) with 10 or more hours, in adjusted analyses, reported Wuxiang Xie, PhD, of the Peking University Clinical Research Institute in Beijing, and co-authors.

Extreme sleep duration also was associated with lower cognitive function at baseline, they wrote in JAMA Network Open.

Findings were consistent in English and Chinese cohorts, despite cultural differences. An inverted U-shaped association between sleep duration and change in global cognition score emerged, which also was seen in longitudinal

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DEAR DR. ROACH: I am a 63-year-old female who has suffered with Epstein-Barr virus twice in the past two years. My understanding is that for many people, this virus lies dormant until a trigger, such as stress, causes it to emerge.

My symptoms consisted of fever, extreme exhaustion and weakness. After three weeks, I am slowly feeling better. I never want to feel like this again! Aside from maintaining a healthy diet, exercising and stressing less, do you have any suggestions as to how I can stay symptom-free in the future? — R.K.

ANSWER: Epstein-Barr virus is the classic cause of infectious mononucleosis, which is a common condition in children and adolescents. Its symptoms of early fever followed by days or weeks of fatigue are nonspecific. Other viruses and even a parasite can cause a similar symptoms. Blood testing can confirm the diagnosis.

EBV is in the herpes family, and

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