Theitemswerethenrefinedandadministeredtoanationalsampleofchronicpatients(N=382)toassessthemeasure’spsychometricperformance.Afinalphaseoftest-retestreliabilitywasperformed.TheanalysisshowedthatthePHEScalehasgoodpsychometricpropertieswithgoodcorrelationwithconcurrentmeasuresandsolidreliability.Havingavalidandreliablemeasuretoassesspatientengagementisthefirststepinunderstandingpatientengagementanditsroleinhealthcarequality,outcomes,andcostcontainment.ThePHEScaleshowsapromisingclinicalrelevance,indicatingthatitcanbeusedtotailorinterventionandassesschangesafterpatientengagementinterventions.