Featured Research

from universities, journals, and other organizations

Lack Of Sunlight May Increase Lung Cancer Risk

Date:
December 23, 2007
Source:
British Medical Journal
Summary:
Lack of sunlight may increase the risk of lung cancer, suggests a study of rates of the disease in over 100 countries. Lung cancer kills over a million people every year around the globe. The researchers looked at the association between latitude, exposure to ultraviolet B (UVB) light, and rates of lung cancer according to age in 111 countries across several continents.

Lack of sunlight may increase the risk of lung cancer, suggests a study of rates of the disease in over 100 countries. Lung cancer kills over a million people every year around the globe.

Related Articles


The researchers looked at the association between latitude, exposure to ultraviolet B (UVB) light, and rates of lung cancer according to age in 111 countries across several continents.

They took account of the amount of cloud cover and aerosol use, both of which absorb UVB light, and cigarette smoking, the primary cause of lung cancer

International databases, including those of the World Health Organization, and national health statistics were used.

Smoking was most strongly associated with lung cancer rates, accounting for between 75% and 85% of the cases.

But exposure to sunlight, especially UVB light, the principal source of vitamin D for the body, also seemed to have an impact, the findings showed.

The amount of UVB light increases with proximity to the equator. And the analyses showed that lung cancer rates were highest in those countries furthest away from the equator and lowest in those nearest.

Higher cloud cover and airborne aerosol levels were also associated with higher rates of the disease.

In men, the prevalence of smoking was associated with higher lung cancer rates, while greater exposure to UVB light was associated with lower rates.

Among women, cigarette smoking, total cloud cover, and airborne aerosols were associated with higher rates of lung cancer, while greater exposure to UVB light was associated with lower rates.

The associations for a protective role for UVB light persisted after adjusting for smoking.

The link between cancer and sunlight is chemically plausible, say the authors, because laboratory research has shown that vitamin D can halt tumour growth by promoting the factors responsible for cell death in the body.

“Although cigarette smoking is the main cause of lung cancer, greater UVB exposure may reduce the incidence of the disease,” they conclude.

Journal reference: Could ultraviolet B irradiance and vitamin D be associated with lower incidence rates of lung cancer? J Epidemiol Community Health 2007; 62: 69-74.


Story Source:

The above story is based on materials provided by British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

British Medical Journal. "Lack Of Sunlight May Increase Lung Cancer Risk." ScienceDaily. ScienceDaily, 23 December 2007. <www.sciencedaily.com/releases/2007/12/071220235735.htm>.
British Medical Journal. (2007, December 23). Lack Of Sunlight May Increase Lung Cancer Risk. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2007/12/071220235735.htm
British Medical Journal. "Lack Of Sunlight May Increase Lung Cancer Risk." ScienceDaily. www.sciencedaily.com/releases/2007/12/071220235735.htm (accessed November 28, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, November 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rural India's Low-Cost Sanitary Pad Revolution

Rural India's Low-Cost Sanitary Pad Revolution

AFP (Nov. 28, 2014) — One man hopes his invention -– a machine that produces cheap sanitary pads –- will help empower Indian women. Duration: 01:51 Video provided by AFP
Powered by NewsLook.com
Research on Bats Could Help Develop Drugs Against Ebola

Research on Bats Could Help Develop Drugs Against Ebola

AFP (Nov. 28, 2014) — In Africa's only biosafety level 4 laboratory, scientists have been carrying out experiments on bats to understand how virus like Ebola are being transmitted, and how some of them resist to it. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
WHO Says Male Ebola Survivors Should Abstain From Sex

WHO Says Male Ebola Survivors Should Abstain From Sex

Newsy (Nov. 28, 2014) — WHO cites four studies that say Ebola can still be detected in semen up to 82 days after the onset of symptoms. Video provided by Newsy
Powered by NewsLook.com
Ebola Leaves Orphans Alone in Sierra Leone

Ebola Leaves Orphans Alone in Sierra Leone

AFP (Nov. 27, 2014) — The Ebola epidemic sweeping Sierra Leone is having a profound effect on the country's children, many of whom have been left without any family members to support them. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins