Featured Research

from universities, journals, and other organizations

Extensive TV watching linked with increased risk of Type 2 diabetes, CVD and all-cause death

Date:
June 14, 2011
Source:
JAMA and Archives Journals
Summary:
In an analysis of data from several studies, watching television for 2-3 hours per day or more was associated with a higher risk of Type 2 diabetes, fatal and nonfatal cardiovascular disease and all-cause death, according to a study in the June 15 issue of JAMA.

In an analysis of data from several studies, watching television for 2-3 hours per day or more was associated with a higher risk of type 2 diabetes, fatal and nonfatal cardiovascular disease and all-cause death, according to a study in the June 15 issue of JAMA.

Television (TV) viewing is the most commonly reported daily activity apart from working and sleeping in many populations around the world. In the United States, the average number of daily hours of TV viewing has recently been reported to be 5 hours. "Beyond altering energy expenditure by displacing time spent on physical activities, TV viewing is associated with unhealthy eating (e.g., higher intake of fried foods, processed meat, and sugar-sweetened beverages and lower intake of fruits, vegetables, and whole grains) in both children and adults," according to background information in the article. "Physical inactivity, various dietary factors, and smoking are well-established independent risk factors of type 2 diabetes, cardiovascular disease, and all-cause mortality. Because TV viewing is the most prevalent and pervasive sedentary behavior, there is a great deal of interest in quantifying its independent association with health outcomes. However, a systematic and quantitative assessment of published studies is not available."

Anders Grontved, M.P.H., M.Sc., of the University of Southern Denmark, Odense, and Frank B. Hu, M.D., Ph.D., of the Harvard School of Public Health, Boston, conducted a meta-analysis to summarize data from published prospective cohort studies on the association between TV viewing and the incidence of type 2 diabetes, nonfatal or fatal cardiovascular disease and all-cause mortality. The researchers performed a search of the medical literature for relevant studies from 1970 to March 2011 and identified 8 studies that met criteria for inclusion in the analysis.

For type 2 diabetes (4 studies), the total number of individuals was 175,938 with 6,428 incident cases during an average follow-up of 8.5 years. For fatal or nonfatal cardiovascular disease (4 studies), the total number of individuals was 34,253 with 1,052 incident cases during an average follow-up of 10.4 years; and for all-cause mortality (3 studies), the total number of individuals was 26,509 with 1,879 deaths during an average follow-up duration of 6.8 years.

An analysis of data indicated that per 2 hours of TV viewing time per day was associated with a 20 percent higher risk for type 2 diabetes; a 15 percent increased risk for fatal or nonfatal cardiovascular disease; and a 13 percent higher risk for all-cause mortality. "While the associations between time spent viewing TV and risk of type 2 diabetes and cardiovascular disease were linear, the risk of all-cause mortality appeared to increase with TV viewing duration of greater than 3 hours per day," the authors write.

Based on incidence rates in the United States, the researchers estimated that the absolute risk difference (cases per 100,000 individuals per year) per 2 hours of TV viewing per day was 176 for type 2 diabetes, 38 for fatal cardiovascular disease, and 104 for all-cause mortality.

"It is biologically plausible that prolonged TV viewing is associated with type 2 diabetes, cardiovascular disease, and all-cause mortality. Numerous prospective studies have reported associations of TV viewing with biological risk factors for these outcomes including obesity, adverse lipid levels, and clustered cardiovascular risk; however, some studies did not report these associations. Furthermore, associations of sedentary behaviors analogous to TV viewing (e.g., sitting during work or while driving) with type 2 diabetes, fatal or nonfatal cardiovascular disease, and all-cause mortality have been reported in cohort studies," the authors write.

"Additional research quantifying the mediating influence of diet and physical inactivity is warranted. Future research also should assess the association of prolonged daily use of new media devices on energy balance and chronic disease risk."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Anders Gr๘ntved and Frank B. Hu. Television Viewing and Risk of Type Diabetes, Cardiovascular Disease, and All-Cause Mortality: A Meta-Analysis. JAMA, 2011;305(23):2448-2455. DOI: 10.1001/jama.2011.812

Cite This Page:

JAMA and Archives Journals. "Extensive TV watching linked with increased risk of Type 2 diabetes, CVD and all-cause death." ScienceDaily. ScienceDaily, 14 June 2011. <www.sciencedaily.com/releases/2011/06/110614161852.htm>.
JAMA and Archives Journals. (2011, June 14). Extensive TV watching linked with increased risk of Type 2 diabetes, CVD and all-cause death. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2011/06/110614161852.htm
JAMA and Archives Journals. "Extensive TV watching linked with increased risk of Type 2 diabetes, CVD and all-cause death." ScienceDaily. www.sciencedaily.com/releases/2011/06/110614161852.htm (accessed August 1, 2014).

Share This




More Health & Medicine News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Vaccine Might Be Coming, But Where's It Been?

Ebola Vaccine Might Be Coming, But Where's It Been?

Newsy (Aug. 1, 2014) — Health officials are working to fast-track a vaccine — the West-African Ebola outbreak has killed more than 700. But why didn't we already have one? Video provided by Newsy
Powered by NewsLook.com
Study Links Certain Birth Control Pills To Breast Cancer

Study Links Certain Birth Control Pills To Breast Cancer

Newsy (Aug. 1, 2014) — Previous studies have made the link between birth control and breast cancer, but the latest makes the link to high-estrogen oral contraceptives. Video provided by Newsy
Powered by NewsLook.com
House Republicans Vote to Sue Obama Over Healthcare Law

House Republicans Vote to Sue Obama Over Healthcare Law

Reuters - US Online Video (July 31, 2014) — The Republican-led House of Representatives votes to sue President Obama, accusing him of overstepping his executive authority in making changes to the Affordable Care Act. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Uganda on Alert for Ebola but No Confirmed Cases

Uganda on Alert for Ebola but No Confirmed Cases

AFP (July 31, 2014) — Uganda's health minister said on Thursday that there are no confirmed cases of Ebola in the country, but that it remained on alert for cases of the deadly virus. Uganda has suffered Ebola outbreaks in the past, most recently in 2012. Duration: 00:59 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:
from the past week

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