Cessation of Dual Use of Cigarettes and E-cigarettes During Pregnancy

This simultaneous cessation intervention group will target CCs and ECs at the same time. Participants in this group will receive a multi-component cessation intervention, including behavior counseling, biomarker feedback via monitoring changes in levels of exposure to nicotine (urine cotinine) and CC smoke (breath carbon monoxide), and contingent financial incentives for biochemically verified abstinence.

This stepwise cessation intervention group will first target CCs and then target ECs after quitting CCs. Participants in this group will receive a multi-component cessation intervention, including behavior counseling, biomarker feedback via monitoring changes in levels of exposure to nicotine (urine cotinine) and CC smoke (breath carbon monoxide), and contingent financial incentives for biochemically verified abstinence.

Participants assigned to the control group will receive behavior counseling only. They will complete the same number of study visits as their counterparts in the intervention groups.