1. Global Prevalence of and Risk Factors for Irritable Bowel Syndrome: A Meta-analysis 
Rebecca M. Lovell, Alexander C. Ford 
Clinical Gastroenterology and Hepatology 
Volume 10, Issue 7, Pages e4 (July 2012)
DOI: /j.cgh
Copyright © 2012 AGA Institute Terms and Conditions

2. Figure 1 Prevalence of IBS according to country.
Clinical Gastroenterology and Hepatology  , e4DOI: ( /j.cgh )
Copyright © 2012 AGA Institute Terms and Conditions

3. Figure 2
Pooled OR for IBS in those aged 50 years or older compared with those aged younger than 50 years.
Clinical Gastroenterology and Hepatology  , e4DOI: ( /j.cgh )
Copyright © 2012 AGA Institute Terms and Conditions

4. Supplementary Figure 1
Flow diagram of assessment of studies identified in the systematic review and meta-analysis.
Clinical Gastroenterology and Hepatology  , e4DOI: ( /j.cgh )
Copyright © 2012 AGA Institute Terms and Conditions