Cardiotocography interpretation skills and the association with size of maternity unit, years of obstetric work experience and healthcare professional background: a national cross-sectional study.

CTG knowledge, interpretation skills and decision-making measured by a written assessment were positively associated with working in large maternity units and having < 15 years of obstetric work experience. This might indicate a challenge in maintaining CTG skills in small units and among experienced staff but could also reflect different levels of motivation, test familiarity and learning culture. Whether the findings are transferable to the clinical setting was not examined.