SCT questionnaires
The data for the behaviour items and SCT constructs were transformed to a 0–100 scale to enable comparisons across all constructs. The sum scores for the 7-point Likert scales were calculated by combining the individual questions within the two behaviour categories and for each SCT construct (The same process was carried out at the behaviour sub-category level to explore whether there were any specific areas of midwifery practice driving the overall category scores. Descriptive statistics were calculated to examine the mean and standard deviation (SD) of the scores at baseline and follow up, for the intervention and control arms. Mean difference in the change in pre- and post-intervention scores were estimated for midwives who returned both questionnaires, alongside 95% confidence intervals (CI).Internal consistency of the questionnaire was measured using Cronbach’s Alpha, pooling the intervention and control arm data at baseline. The analysis was applied to the data within the communication-related behaviours and support/intervention-related behaviours for each SCT construct to assess whether midwives who scored low or high on one question also scored similarly on other questions within that group. An overall Cronbach’s Alpha score of 0.8 or above, a corrected item total correlation of 0.4 or above, and if the Cronbach’s Alpha score for any deleted variable was lower than the overall value, was considered to represent good internal consistency [