Physical activity, television viewing time, and retinal vascular caliber

Anuradha, Satyamurthy, Dunstan, David W., Healy, Genevieve N., Shaw, Jonathan E., Zimmet, Paul Z., Wong, Tien Y. and Owen, Neville (2011) Physical activity, television viewing time, and retinal vascular caliber. Medicine and Science in Sports and Exercise, 43 2: 280-286. doi:10.1249/MSS.0b013e3181ea0f0d


Author Anuradha, Satyamurthy
Dunstan, David W.
Healy, Genevieve N.
Shaw, Jonathan E.
Zimmet, Paul Z.
Wong, Tien Y.
Owen, Neville
Title Physical activity, television viewing time, and retinal vascular caliber
Journal name Medicine and Science in Sports and Exercise   Check publisher's open access policy
ISSN 0195-9131
1530-0315
Publication date 2011-02
Sub-type Article (original research)
DOI 10.1249/MSS.0b013e3181ea0f0d
Volume 43
Issue 2
Start page 280
End page 286
Total pages 7
Place of publication Philadelphia, United States
Publisher Lippincott Williams & Wilkins
Collection year 2012
Language eng
Formatted abstract
Purpose: To examine the associations of physical activity and television (TV) viewing time with retinal vascular caliber in Australian adults.

Methods:
A total of 2024 adults aged 25 yr or older without known diabetes in the Australian Diabetes, Obesity, and Lifestyle Study (AusDiab, 1999–2000), a population-based cross-sectional study, were evaluated. Retinal vascular calibers (both arteriolar and venular calibers) were measured from digital retinal photographs using a computer-assisted method and were summarized into central retinal
artery and vein equivalents. Self-reported physical activity time and TV viewing time were obtained using interviewer-administered questionnaires.

Results: For physical activity, no statistically significant multivariate relationships emerged for men or for women. After adjusting for confounders (age, sex, education, cigarette smoking, diet quality, waist circumference, systolic blood pressure, plasma
glucose levels, serum fibrinogen, serum triglyceride, and physical activity time), men who watched TV for at least 2 hIdj1 had a venular caliber that was 4.71 Km (95% confidence interval = 1.37–8.04 Km, P = 0.006) wider compared with those watching G2 hIdj1 of TV. No significant association with venular caliber was noted in women.

Conclusions: These findings provide the first evidence of an association between TV viewing time (a common, leisure time sedentary behavior) and retinal microcirculation. Further research is needed to examine these associations in different populations and by using more comprehensive physical activity and sedentary behavior measures.
Keyword Sedentary behavior
Retina
Microvessels
Arteriole
Venule
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Cancer Prevention Research Centre Publications
Official 2012 Collection
School of Public Health Publications
 
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Created: Sun, 20 Feb 2011, 00:02:45 EST