Review for 10.1186/s12876-021-01716-6 (2021)

Reviewer’s report
Title: 
The incidence and prevalence of inflammatory bowel disease in UK
primary care: a retrospective cohort study of the IQVIA Medical Research
Database
Version: 
1 
Date: 
30 Dec 2020
Reviewer's report:
Comment 1:
Can you explain and add on the reason for 
the increase in prevalence (2006 and 2016 from 106.2 to 142.1) and the decrease
in incidence (76.4 per 100,000 recorded in 2010 and the lowest incidence of 63.5
per 100,000 recorded in 2016) ?
Comment 2:
In line 222, Will "Improvements in diagnostic technology" increase the number
of medical tests and cause doubts about confounding by indication? If so, can
you try to explain?
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