This study aimed to evaluate differences in healthcare resource utilization and cost among patients with controlled and uncontrolled asthma. Claims data from a German sickness fund was linked to patient survey data. Outpatient physicians enrolled patients and assessed asthma control using the ACT questionnaire. All-cause and asthma-specific healthcare resource use (HCRU)/costs were compared descriptively and based on multivariable models using a continuous ACT score.

A multi-center observational study was conducted addressing adult patients with asthma who were prescribed regular maintenance medication between 2014 and 2016 to identify the potential barriers to medication adherence among adult patients with asthma in Germany. Data were derived from physicians’ documentation and claims data, which were linked to the primary observational data and patient survey data (Adherence Barriers Questionnaire - ABQ).

Real-world evidence (RWE) can inform patient management decisions, but RWE studies are associated with limitations. Linkage of different RWE data types could address such limitations by enriching data and improving scientific quality. Using the example of chronic obstructive pulmonary disease (COPD) in Germany, this study assessed the value of data linkage between primary and secondary data sources for RWE.