The Maternal Pertussis Randomised Control Trial: best practice for the communication of pertussis booster vaccine recommendations to new mothers.

INTERVENTION: Health‐message framing: The tri‐fold, coloured A4 pamphlet was written either in a gain or loss frame, indicating either what mothers gain from the cocooning strategy or what mothers would lose by not receiving the pertussis booster vaccine (for adults). The intervention was administered by the research nurse once the baseline questionnaire was completed. Allocation concealment was implement by placing the pamphlet in an opaque envelope. The interventions ( gain or loss pamphlet) were allocated to participants using random block allocation by week. CONDITION: Pertussis PRIMARY OUTCOME: Pertussis booster vaccine uptake by postpartum women, assessed by follow up questionnaire completed prior to discharge. SECONDARY OUTCOME: Additional follow up ( by preferred method of phone or email) to assess household pertussis vaccine status and household exposure to pertussis and/or epidsode/s of pertussis. Baseline attitude and other factors influencing vaccine uptake were assessed using a self‐administered, web‐based questionnaire completed on an Apple Ipad (Registered Trademark) at the participant's bedside. ; ; The questionnaire was comprised of 5 parts structure according to the Health Belief Model framework, with questions on: a) pertussis vaccination information sources b) pertussis susceptibility and severity c) vaccine benefits and barriers d) intentions to be vaccinated and e) demographic information. INCLUSION CRITERIA: Postpartum women not up to date with pertussis booster recommendations ( dTpa <10 years)