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. 2022 Jun 6;4(8):711–720. doi: 10.1002/acr2.11447

Figure 1.

Figure 1

Flowchart of patient selection. (A) SLE pregnancies were selected from the EHR using four or more SLE ICD‐9 (710.0) or ICD‐10‐CM (M32.1 or M32.8 or M32.9) codes while also requiring one or more ICD‐9 or ICD‐10‐CM pregnancy or delivery‐related codes. A full list of these codes is in Supplemental Table 1. We then required chart review to confirm SLE diagnosis by a rheumatologist resulting in 174 SLE cases with 255 pregnancies and 132 SLE cases with 178 pregnancies with restricting to deliveries after SLE diagnosis. (B) Control pregnancies were selected from the EHR using the same pregnancy or delivery‐related codes used for the SLE pregnancies aforementioned along with requiring that controls not have codes for autoimmune diseases. We then chart‐reviewed a random 250 controls to ensure no autoimmune disease and to assess pregnancy outcomes, resulting in 224 mothers with 604 pregnancies. EHR, electronic health record; ICD, International Classification of Diseases; SLE, systemic lupus erythematosus.