Original Article
Copyright ©2010 Baishideng.
World J Gastroenterol. Feb 28, 2010; 16(8): 960-965
Published online Feb 28, 2010. doi: 10.3748/wjg.v16.i8.960
Table 1 Basic demography of study population (n = 8172)
Gender
Male:female4841:3331
Mean age (yr)56
Area
Pear River Triangle area4327
East area1583
West area1480
North area782