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Sampling method:

AE Abbas Esmaeilzadeh
AG Azita Ganji
LG Ladan Goshayeshi
KG Kamran Ghafarzadegan
MA Mehdi Afzal Aghayee
HM Homan Mosanen Mozafari
HS Hassan Saadatniya
AH Abdolrasol Hayatbakhs
VG Vahid Ghavami Ghanbarabadi
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Based on our previous study on general population of Mashhad aged 15-65 years, we had 815 cases of age-, and sex-matched to our patients with CD with negative tTG who were selected as control group. Individulas aged less than 18 years and more than 60 years were excluded. After applying inclusion and exclusion criteria finally 657 (3 times of patients with CD group) cases for control group were selected randomly. Patients with confirmed CD were selected by means of purposive sampling.

Of the 301 patients with CD, we also excluded patients aged less than 18 and more than 60 years. In the celiac group 48 patients aged less than 18 years, 3 patients aged over 60 years, 17 patients with tTG titer below 30 (UN/mL), or with missed data, and 14 patients with Marsh=<1 were excluded. Finally 219 patients in celiac group were included in this study. The results are shown in tables 1 and ​and22.

So, the study was conducted on two groups with confirmed CD (case group) and the healthy population (control group).

Copyright and License information:  ©2016 by Middle East Journal of Digestive Diseases
This work is published by Middle East Journal of Digestive Diseases as an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-sa/4.0/). Non-commercial uses of the work are permitted, provided the original work is properly cited.

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