Rapid Communication
Copyright ©2007 Baishideng Publishing Group Inc.
World J Gastroenterol. Oct 28, 2007; 13(40): 5367-5370
Published online Oct 28, 2007. doi: 10.3748/wjg.v13.i40.5367
Table 1 The demographic characteristics of patients in the study
ArdabilGolestanTehranTotal
Patients No.314261186761
Age, yr (SD)63 (10.8)64.4 (11.8)60.1 (12.7)62.8 (11.7)
Male/Female224/90161/100123/63508/253
Urban/Rural residents97/21785/176186/0368/393