Primary outcome measure Time to alcohol onset and progression to binge drinking were assessed with two survival models. (bmjopen.bmj.com)
The weaknesses of the study include the use of a composite primary outcome measure, because of the low event rates for individual perinatal outcomes. (bmj.com)
Primary outcome measures Biologically confirmed drug abstinence measured at 12 - month follow - up, sober at last sex act, condom use with main and casual sex partners, and intimate partner violence. (bmjopen.bmj.com)