Figure 2. Secondary and sensitivity analyses with the unexposed group as reference.

Adjusted risk ratio (RR) of oral clefts (dots) and 95% confident intervals (CIs, lines). Medicaid Analytic eXtract, 2000 to 2010. Relative risk estimate for the primary analysis is referred to as primary RR (2.90, 95% CI 1.56–5.40). Rx = prescription; T1 = first trimester.