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  • Low Vitamin D levels...

Low Vitamin D levels associated with increased mortality risk: Lancet

Dr. Shravani DaliWritten by Dr. Shravani Dali Published On 2021-11-01T11:15:33+05:30  |  Updated On 2021-11-01T11:19:37+05:30
Low Vitamin D levels associated with increased mortality risk: Lancet
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Low vitamin D levels associated with increased mortality risk, suggests a study published in The Lancet Diabetes and Endocrinology. Randomised trials of vitamin D supplementation for cardiovascular disease and all-cause mortality have generally reported null findings. However, the generalisability of results to individuals with low vitamin D status is unclear. This study aimed...

Low vitamin D levels associated with increased mortality risk, suggests a study published in The Lancet Diabetes and Endocrinology.

Randomised trials of vitamin D supplementation for cardiovascular disease and all-cause mortality have generally reported null findings. However, the generalisability of results to individuals with low vitamin D status is unclear. This study aimed to characterise dose-response relationships between 25-hydroxyvitamin D (25[OH]D) concentrations and risk of coronary heart disease, stroke, and all-cause mortality in observational and Mendelian randomisation frameworks.

Observational analyses were undertaken using data from 33 prospective studies comprising 500 962 individuals with no known history of coronary heart disease or stroke at baseline. Mendelian randomisation analyses were performed in four population-based cohort studies (UK Biobank, EPIC-CVD, and two Copenhagen population-based studies) comprising 386 406 middle-aged individuals of European ancestries, including 33 546 people who developed coronary heart disease, 18 166 people who had a stroke, and 27 885 people who died. Primary outcomes were coronary heart disease, defined as fatal ischaemic heart disease (International Classification of Diseases 10th revision code I20-I25) or non-fatal myocardial infarction (I21-I23); stroke, defined as any cerebrovascular disease (I60-I69); and all-cause mortality.

The Findings of the study are as follows:

  • Observational analyses suggested inverse associations between incident coronary heart disease, stroke, and all-cause mortality outcomes with 25(OH)D concentration at low 25(OH)D concentrations.
  • In population-wide genetic analyses, there were no associations of genetically-predicted 25(OH)D with coronary heart disease, stroke, or all-cause mortality. However, for the participants with vitamin D deficiency (25[OH]D concentration <25 nmol/L), genetic analyses provided strong evidence for an inverse association with all-cause mortality and non-significant inverse associations for stroke and coronary heart disease.
  • A finer stratification of participants found inverse associations between genetically-predicted 25(OH)D concentrations and all-cause mortality up to around 40 nmol/L.

Thus, the researchers conclude that stratified Mendelian randomisation analyses suggest a causal relationship between 25(OH)D concentrations and mortality for individuals with low vitamin D status. Our findings have implications for the design of vitamin D supplementation trials, and potential disease prevention strategies.

Reference:

Estimating dose-response relationships for vitamin D with coronary heart disease, stroke, and all-cause mortality: observational and Mendelian randomisation analyses by Emerging Risk Factors Collaboration/EPIC-CVD/Vitamin D Studies Collaboration published in The Lancet Diabetes and Endocrinology.

DOI: https://doi.org/10.1016/S2213-8587(21)00263-1



the lancet diabetes and endocrinology vitamin d vitamin d concentration vitamin d levels low vitamin d mortality risk 
Source : The Lancet Diabetes and Endocrinology
Dr. Shravani Dali
Dr. Shravani Dali

    BDS

    Dr. Shravani Dali has completed her BDS from Pravara institute of medical sciences, loni. Following which she extensively worked in the healthcare sector for 2+ years. She has been actively involved in writing blogs in field of health and wellness. Currently she is pursuing her Masters of public health-health administration from Tata institute of social sciences. She can be contacted at editorial@medicaldialogues.in.

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