Non-adherence and non-persistence in long-term COPD inhaler therapy: an Ingress-health claims data analysis. In its latest claims data analysis, Ingress-health identified a substantial percentage of COPD patients being either non-adherent or non-persistent with their therapy. Results of this study were published here. The published analysis is the first of its kind because it analyzed adherence and persistence to therapy in a separate way which is superior to the previously combined analysis of both treatment phenomena.