Identification of child mental health problems by combining electronic health record information from different primary healthcare professionals: a population-based cohort study.

Objectives: To investigate the potential value of combining information from electronic health records from Dutch general practitioners (GPs) and preventive youth healthcare professionals (PYHPs) in predicting child mental health problems (MHPs).

Design: Population-based retrospective cohort study.

Setting: General practice, children who were registered with 76 general practice centres from the Leiden University Medical Centre (LUMC) primary care academic network Extramural LUMC Academic Network in the Leiden area, the Netherlands.