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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Pharmacoepidemiol Drug Saf. 2016 Feb 10;25(5):512–520. doi: 10.1002/pds.3977

Figure 1. Age, sex, and race adjusted monthly proportion (risk) differences for chest X-rays comparing ACEI versus ARB initiators: 2007 – 2012.

Figure 1

ACEI – angiotension converting enzyme inhibitors, ARB - angiotensin converting enzyme

CI – Confidence intervals

Index date – Date of the first recorded prescription (initiation date)

Pre – period before initiation

Post – period after initiation

The first month post-index also contains the index date (date of drug initiation)