Table and Figure headings:
Table 1. Demographic and clinical characteristics compared
between placental abruption cases and controls. Clinical characteristics
are specific to the pregnancy affected by placental abruption.
Table 2. Results from primary analysis of familial risk of
placental abruption.
*Variables adjusted for include age, year of pregnancy, race, ethnicity,
education level, and parity.
Table 3. Results from sensitivity analysis of familial risk of
placental abruption excluding cases with “antepartum bleeding”.
*Variables adjusted for include age, year of pregnancy, race, ethnicity,
education level, and parity.
Table 4. Clinical risk factors with estimated odds ratios
associated with placental abruption.
Table 5. Results from subgroup analysis of familial risk of
placental abruption adjusting for demographic and clinical risk factors.
*Demographic variables adjusted for include age, year of pregnancy,
race, ethnicity, education level, and parity. Clinical variables
included smoking, diabetes, uterine anomaly, hypertension, and pre-labor
rupture of membranes (PROM) in the pregnancy affected by placental
abruption, and cesarean delivery in a prior pregnancy.