International journal of nursing studies
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To conduct a systematic review to check the level of validity and reliability of the Manchester Triage System and the quality of reporting of literature on this topic. ⋯ In this review, the Manchester Triage System shows a wide inter-rater agreement range with a prevalence of good and very good agreement. Its safety was low because of the high rate of undertriage and the low sensitivity in predicting higher urgency levels. The high rate of overtriage could cause unnecessarily high use of resources in the emergency department. The quality of the reporting in studies of the reliability and validity of the Manchester Triage System is good.