Table 1.
Pregnancy algorithm hierarchy of initial pregnancy outcome, based on outcome type and code type present (Diagnosis, Procedure, or Diagnosis-Related Group [DRG]).
Fig 1.
Schematic of select pregnancy algorithm implementation steps.
Abbreviations: ECT = ectopic pregnancy, IAB = induced abortion, LB = live birth, LMP = last menstrual period, SAB = spontaneous abortion, SB = stillbirth. a Select verification steps for pregnancy outcome type and/or gestational age. b Represent the minimum and maximum service dates associated with claims that have a pregnancy outcome diagnosis, procedure, and/or DRG code. See supporting files for more information.
Fig 2.
Identification of cohort of pregnant women, MarketScan commercial data, 2008–2019.
a Extracted and then deduplicated inpatient, outpatient, and facility header claims with codes from S2 into pregnancy-related ‘records’: distinct combinations of service dates and pregnancy-related codes (diagnosis, procedure, or diagnosis related group). b Records likely belonging to the same pregnancy were grouped together into pregnancy episodes. c Because women could have more than one pregnancy, the sum of these categories will be greater than the total number of women.
Table 2.
Characteristics of pregnancy cohort overall and by international statistical classification of diseases clinical modification and procedure coding systems (ICD) era MarketScan commercial data, 2008–2019 (N = 5,812,699 pregnancies).
Table 3.
Comparison of live birth pregnancies that linked and did not link to an infant record, Marketscan commercial data, 2008–2019 (N = 4,533,630).