[Multimorbidity and its Importance in Future Health Care in Germany: a Secondary Data Analysis Based on 67 Million Health Insurance Policy Holders].

Background: Multimorbidity is a particular challenge for health care systems. In Germany, epidemiological findings are primarily sample-based. The estimated prevalence among adults in Germany is high, but there are methodological problems, such as a lack of a uniform definition.

Method: Statutory health insurance data from the information system for health care data ("Informationssystem Versorgungsdaten") of the former German Institute for Medical Documentation and Information were analyzed. A total of 67.3 million people with statutory health insurance in 2014 were included. Multimorbidity was defined by the presence of at least three chronic diseases from a list of 46 diseases per ICD-10.

Results: A total of 21,157,937 individuals, or 31.4% of the total cohort, were defined as multimorbid. In men, progression of multimorbidity occurred at the age of about 40 years, whereas the increase was seen at the age of about 35 years in women. The different disease burden varied in different age and sex groups.

Conclusion: A better understanding of complex disease interactions in relation to age and sex is needed. Interdisciplinary approaches with specific care concepts for multimorbidity, adapted to the chronic care model, should be explored in order to achieve an ideal care situation in Germany.