Ovelheiro, AnaMiranda, ArmandinaCorreia, HelenaCardoso, AnaFaria, Ana PaulaRequeijo, José Gomes2020-05-152020-05-152019-04http://hdl.handle.net/10400.18/6670Introduction: The haemogram is one of the most frequently requested laboratory tests, in hospital and ambulatory. Therefore, given its importance in the clinical context, an evaluation was performed on the results of the clinical laboratories participating in PNAEQ’s EQA Cell Blood program. The main objective of this work was to improve the Sigma quality level of the clinical laboratories and reduce the variability of their results.engSix SigmaExternal Quality AssessmentEQAEvaluation of Laboratory PerformanceHaemogramPNAEQ’s EQA Cell Blood programAvaliação Externa da QualidadeAEQPrograma Nacional de Avaliação Externa da QualidadePNAEQconference object