[Prevalence Rates of Mild Cognitive Impairment and of Dementia in the German Outpatient Health Care Sector 2009-2016].

Objective In Germany, the number of patients with dementia is expected to increase from 1.7 (2017) to more than 3 million people (2050). Preventive and therapeutic measures target at early stages of dementia such as mild cognitive impairment (MCI). Aim of the study is to compare prevalence rates of MCI and dementia over time. Methods The study was based on the complete nationwide outpatient claims data of the panel doctors services according to 295 SGB V. We identified prevalent patients with MCI (PwMCI) and with dementia (PwD) in the years 2009 to 2016 treated by general practitioners or neuropsychiatric specialists. Results The number of prevalent PwMCI/PwD increased from 50,760/1,014,381 (2009) to 166,919/1,416,319 (2016) and the corresponding prevalence rates from 0.13% to 0.42% (MCI) and from 2.52% to 3.55% (dementia), resp. Conclusion Despite the significant prevalence gain, the number of PwMCI identified in outpatient health claims data is much lower than the expected number of 2,8 to 3,7 million people at the population level. Therefore, we anticipate a further increase in the number of PwMCI being treated in the outpatient sector over the coming years.