Plasma vitamin C concentrations and risk of incident respiratory diseases and mortality in the European Prospective Investigation into Cancer-Norfolk Cohort

Myint, Phyo Kyaw, Wilson, Andrew M., Clark, Allan B., Luben, Robert N., Wareham, Nicholas J. and Khaw, Kay-Tee (2019) Plasma vitamin C concentrations and risk of incident respiratory diseases and mortality in the European Prospective Investigation into Cancer-Norfolk Cohort. European Journal of Clinical Nutrition, 73 (11). 1492–1500. ISSN 0954-3007

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Abstract

Background/Objectives: Cancerous and non-cancerous respiratory diseases are common and contribute significantly to global disease burden. We aim to quantify the association between plasma vitamin C concentrations as an indicator of high fruit and vegetable consumption and the risk of incident respiratory diseases and associated mortality in a general population. Subjects/Methods: Nineteen thousand three hundred and fifty-seven men and women aged 40–79 years without prevalent respiratory diseases at the baseline (1993–1997) and participating in the European Prospective Investigation into Cancer (EPIC)-Norfolk study in the United Kingdom were followed through March 2015 for both incidence and mortality from respiratory diseases. Results: There were a total of 3914 incident events and 407 deaths due to any respiratory diseases (excluding lung cancers), 367 incident lung cancers and 280 lung cancer deaths during the follow-up (total person-years >300,000 years). Cox's proportional hazards models showed that persons in the top quartiles of baseline plasma vitamin C concentrations had a 43% lower risk of lung cancer (hazard ratio (HR) 0.57; 95% confidence interval (CI): 0.41–0.81) than did those in the bottom quartile, independently of potential confounders. The results are similar for any non-cancerous respiratory diseases (HR 0.85; 0.77–0.95), including chronic respiratory diseases (HR 0.81; 0.69–0.96) and pneumonia (HR 0.70; 0.59–0.83). The corresponding values for mortality were 0.54 (0.35–0.81), 0.81 (0.59–1.12), 0.85 (0.44–1.66) and 0.61 (0.37–1.01), respectively. Confining analyses to non-smokers showed 42% and 53% risk reduction of non-smoking-related lung cancer incidence and death. Conclusions: Higher levels of vitamin C concentrations as a marker of high fruit and vegetable consumption reduces the risk of cancerous and non-cancerous respiratory illnesses including non-smoking-related cancer incidence and deaths.

Item Type: Article
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 23 Nov 2018 15:30
Last Modified: 29 Jun 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/69019
DOI: 10.1038/s41430-019-0393-1

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