Table 2. Comparison of our results with results of previous similar studies.

Reference, year	Number of patients	Mean age (years)	Mean BMI (kg/m 2 )	% Normal endoscopy	% Abnormal endoscopy	% Significant abnormalities
Sharaf et al. 15 , 2004	195	41.2	48.9	10.3	89.7	61.5
Zeni et al. 22 , 2006	159	41.1	49.7	33.4	66.6	9.4
Muñoz et al. 16 , 2008	626	38.5	42	54	46	–
Loewen et al. 9 , 2008	447	40.6	48.6	70	30	18
Schigt et al. 17 , 2014	523	44.3	46.6	49.9	50.1	14.7
Lee et al. 1 , 2017	268	39.1	40.3	48.9	51.1	27.2
This study	1473	41.3	43.7	10.6	89.4	63.8

BMI, body mass index.