Navigation Links
Low vitamin D levels do not increase the risk of chronic obstructive pulmonary disease
Date:11/3/2011

Vitamin D levels are not related to acute exacerbations of chronic obstructive pulmonary disease (AECOPD) in patients with severe COPD, according to a large prospective cohort study involving 973 North American patients. The findings were published online ahead of the print edition of the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

In the study, a secondary analysis of data from a randomized, controlled trial of the effects of azithromycin on the frequency of AECOPD, no relationship was found between baseline Vitamin D levels and time to first AECOPD or between vitamin D levels and AECOPD exacerbation rates.

"Vitamin D insufficiency and deficiency are common in patients with COPD, and patients with severe COPD are at the highest risk for exacerbations, so we hypothesized that low vitamin D levels might increase the risk of AECOPDs," said Ken M. Kunisaki, M.D., of the Minneapolis Veterans Affairs Medical Center. "Our negative results are in contrast with earlier studies in which lower vitamin D levels were associated withhigher rates of respiratory infections in adults and more frequent asthma exacerbations in children."

In the current study, mean forced expiratory volume in one second (FEV1) was 1.12L, 40% of predicted. Mean vitamin D level at baseline was 25.7 12.8 ng/mL, with 33.1% of subjects categorized as vitamin D insufficient (≥20 ng/mLbut <30 ng/mL), 32.0% as vitamin D deficient (<20 ng/mL) and 8.4% as having severe vitamin D deficiency (<10 ng/mL).AECOPDs were defined as a complex of respiratory symptoms (increased or new-onset) of at least 1 of thefollowing: cough, sputum, wheezing, dyspnea, or chest tightness with a durationof at least 3 days and requiring treatment with an antibiotic or systemiccorticosteroid.

During 1 year of follow-up, study subjects experienced a total of 1415 AECOPDs. Of 973 patients,360 (37%)remained AECOPD-free, 278 (29%) had 1 AECOPD, 133 (14%)had 2 AECOPDs, and 202 (21%) had 3 or moreAECOPDs.

In the primary analysis, vitamin D levels had no relationship to time to first AECOPD; for a 10 ng/mL increment in vitamin D level, the estimated hazard ratio was 1.04 (95% confidence interval: 0.97-1.12). In secondary analyses, vitamin D levels were not related to annualized rates of AECOPDs in either Poisson (p=0.82)or negative binomial analyses (p=0.87).

Patients with severe vitamin D deficiency had a higher mean rateof AECOPDs, but this difference was not statistically significant. Patients with severe vitamin D deficiency did not exhibit faster time to first AECOPD than other patients.

The study had some limitations. Vitamin D levels were only assessed at baseline, and so may have changed during the study period. Seasonal changes in vitamin D levels may also have occurred.

"Contrary to what we expected, baseline vitamin D levelswere not related to the risk of subsequent AECOPDs in this large group of COPD patients at high risk of AECOPD," Dr. Kunisaki said. "Vitamin D supplementation is unlikely to have an effect on AECOPD risk in these patients."


'/>"/>
Contact: Nathanial Dunford
ndunford@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

Related medicine news :

1. Caucasians who avoid sun exposure more likely to be vitamin D deficient, Stanford study suggests
2. Low vitamin D common in spine surgery patients
3. Vitamin B-based treatment for corneal disease may offer some patients a permanent solution
4. Women do not get enough vitamin D during the menopause
5. Research Sheds Light on Vitamin Ds Role in Immunity
6. Extra Vitamin E May Be Associated With Prostate Cancer
7. National study finds vitamin E supplement may increase prostate cancer risk
8. Oral steroids linked to severe vitamin D deficiency in nationwide study
9. Could Too Little Vitamin B-12 Shrink the Aging Brain?
10. Many Black Men in Cold Climates Lack Vitamin D
11. Vitamin D deficiency linked with airway changes in children with severe asthma
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/24/2017)... ... , ... The International Association of Eating Disorders Professionals (iaedp) announces the 2017 ... image mannequin art competition. Selected from 15 submissions from around the nation, the top ... 31st annual iaedp Symposium, March 22 – 26 in Las Vegas. , This year, ...
(Date:2/24/2017)... ... 24, 2017 , ... Castle Farms, the celebrated Northern ... with the winning couple announced on Feb. 14, 2017, on Facebook. The free ... vendors: A Matter of Taste, Ryan Rousseau Enterprises, A Touch of Spring and ...
(Date:2/23/2017)... ... February 23, 2017 , ... Rare Disease Report®, which is ... in Rare Disease Day events, hosted by the Rare Disease Legislative Advocates (RDLA) ... website, weekly e-newsletter and quarterly publication, will be conducting interviews with patients and ...
(Date:2/23/2017)... ... February 23, 2017 , ... EBSCO Information ... National Institute for Health and Care Excellence (NICE) framework. The agreement ... Health Service (NHS) to search, order and purchase medical and healthcare-related content through ...
(Date:2/23/2017)... ... February 23, 2017 , ... ... today that it will soon begin franchising throughout the U.S. starting this spring. ... help bring the practice of meditation mainstream. Current Meditation will be the first ...
Breaking Medicine News(10 mins):
(Date:2/24/2017)... NEW YORK , Feb. 23, 2017 /PRNewswire/ ... USD 330.6 million by 2021 from USD 275.9 ... Read the full report: http://www.reportlinker.com/p04718602-summary/view-report.html ... industries, increasing spending on pharmaceutical R&D, and growth ... factors driving the market growth for particle counters. ...
(Date:2/23/2017)... Research and Markets has announced the addition of the ... report to their offering. ... The latest research Autism Spectrum Disorder Drugs Price Analysis ... the global Autism Spectrum Disorder market. The research answers the ... drugs marketed for Autism Spectrum Disorder and their clinical attributes? How ...
(Date:2/23/2017)... Calif., Feb. 23, 2017 Nevro Corp. (NYSE: NVRO), ... solutions for the treatment of chronic pain, today reported financial ... 31, 2016. 2016 Accomplishment & Highlights: ... year 2016, an increase of 228% as reported, over the ... 2016, an increase of 612% over the prior year ...
Breaking Medicine Technology: