Health Behavior

"Pumped at work" was based on the question: "Have you had to use a breast pump at work?", with responses of yes, no, and "not sure."

#### Work Evaluation and Experience

"Reaction to pumping" was conditional on having reported yes to having pumped at work and based on the question: "What type of reaction, if any, have you received from those you work with?", with responses categorized as negative (negative reactions only or some positive and some negative reactions) and positive (no reactions given or positive reactions only). "Pumped longer if easier" was based on the question: "Would you have continued breastfeeding longer if it was easier to pump at work?", with responses of yes, no, and "not sure." Conditional on having reported yes to breastfeeding longer if it was easier at work, "factors" asked people to report what factors would have made it easier, with responses categorized as policy (a copy of the company policy, supportive coworkers, supportive supervisor, or flexible time/hours), and environment (a place to store breastmilk or a private space for pumping). More than one factor could be reported.
