Evaluating associations between patient-to-nurse ratios and mortality, process of care events and vital sign documentation on paediatric wards: a secondary analysis of data from the EPOCH cluster-randomised trial

ObjectiveTo describe the associations between patient-to-nurse staffing ratios and rates of mortality, process of care events and vital sign documentation.DesignSecondary analysis of data from the evaluating processes of care and outcomes of children in hospital (EPOCH) cluster-randomised trial.Setting22 hospitals caring for children in Canada, Europe and New Zealand.ParticipantsEligible hospitalised patients were aged>37 weeks and