Body weight, lifestyle, dietary habits and gastroesophageal reflux disease

Table 2 Association between overweight/obesity and reflux esophagitis

Author	Year	Country	Study design	Population size	Obesity index	Method of data collection	Association
Ruhl et al[49]	1999	USA	Cohort	12 349	BMI	Upper endoscopy	Yes
Hampel et al[13]	2005	USA	Meta-analysis		BMI	Upper endoscopy	Yes
Nocon et al[40]	2007	Germany	Population-based	6215	BMI	Upper endoscopy	Yes
Kim et al[48]	2007	South Korea	Population-based	27 319	BMI	Upper endoscopy	Yes
Kang et al[51]	2007	South Korea	Population-based	2457	BMI, waist circumference	Upper endoscopy	Yes
Lee et al[50]	2008	South Korea	Population-based	3363	BMI, waist-to-hip ratio	Upper endoscopy	Yes
Chung et al[52]	2008	South Korea	Cross-sectional	7078	BMI, waist circumference, visceral adipose tissue	Upper endoscopy	Yes
Furukawa et al[58]	1999	Japan	Cross-sectional	6010	BMI	Upper endoscopy	No
Baldi et al[59]	2008	Italy	Cohort	1542	BMI	Upper endoscopy	No
Zagari et al[47]	2008	Italy	Population-based	1033	BMI	Upper endoscopy	No