A higher education level (odds ratio [OR]=2.66), lower work load (8 work hours/day) (OR=2.66), lactation room with dedicated space (OR=2.38), use of breast pumping breaks (OR=61.6), and encouragement from colleagues (OR=2.78) and supervisors (OR=2.44) to use breast pumping breaks were significant predictors of continued breastfeeding for more than 6 months after returning to work.