4.1. Limitations of the present review
No comparison with other types of depression in the elderly was made because we focused only on comorbidity with MCI. Additionally, we did not show the actual prevalence rate of MCI in patients with MinD as we were not able to find literature on this problem. Though all included studies are based on DSM criteria of MinD, they use different diagnostic tools and time frames. Here we decided to accumulate as much data as possible about this disorder in late life. Therefore, the presence of different sample settings makes meta-analysis not applicable for this review. Geographical and cultural differences were not included in the current analysis, though they may have an impact on prevalence rates.