Covariates
Covariates include ART (Table S3),28,29 cancer
treatment variables such as chemotherapy (Table S4) and radiation (Table
S5) prior to the estimated start date of pregnancy, maternal age at
delivery(15-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-50), maternal
comorbidities before and during pregnancy,30race/ethnicity (Asian, Black, Hispanic, White, Unknown), year of birth
(2000-2004, 2005-2009, 2010-2014, 2015-2020), income
(<$40,000, $40,000-74,999, $75,000-124,999,
$125,000-199,999, $200,000+, unknown), and education
(<12th grade, high school diploma,
< bachelor degree, bachelor degree +, unknown). The Maternal
Comorbidity Index is a validated tool derived in administrative health
claims data to summarize maternal comorbidities occurring up to 6 months
before pregnancy and through pregnancy by attributing weights into a
numerical score that predicts maternal end-organ damage at delivery or
within 30 days postpartum, e.g., severe pre-eclampsia and asthma (Table
S6).31