Study Links Newer Shingles Vaccine to Delayed Dementia Diagnosis

Nelson Vergel

Founder, ExcelMale.com
FROM NATURE MEDICINE
Receipt of a newer recombinant version of a shingles vaccine is associated with a significant delay in dementia diagnosis in older adults, a new study suggests.
"The study builds on previous observations of a reduction in dementia risk with the older live shingles vaccine and reports a delay in dementia diagnosis of 164 days with the newer recombinant version, compared with the live vaccine.
“Given the prevalence of dementia, a delay of 164 days in diagnosis would not be a trivial effect at the public health level. It’s a big enough effect that if there is a causality it feels meaningful,” said senior author Paul Harrison, DM, FRCPsych, professor of psychiatry at the University of Oxford, Oxford, England.

But Dr. Harrison stressed that the study had not proven that the shingles vaccine reduced dementia risk.
“The design of the study allows us to do away with many of the confounding effects we usually see in observational studies, but this is still an observational study, and as such it cannot prove a definite causal effect,” he said.
The study was published online on July 25 in Nature Medicine.
 

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Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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