The association of risky drinking patterns prior to pregnancy with changes in these patterns during pregnancy.

a Adjusted for highest education attained, area of residence, private health insurance.b Adjusted for partner status, violent relationship with a partner (ever).c Adjusted for illicit drug use (ever), smoking (ever).d Adjusted for previous live births.e Adjusted for highest education attained, area of residence, private health insurance, partner status, violent relationship with a partner (ever), illicit drug use (ever), smoking (ever), and previous live births.