Epidemiological aspects of central serous chorioretinopathy

Aim. To analyze the incidence of central serous chorioretinopathy among the Kazan’s population between 2009 and 2018. Methods. A descriptive epidemiological study of the incidence of Central serous chorioretinopathy of the population of Kazan between 2009 and 2018 was conducted. It included an analysis of long-term changes in the incidence of male and female population and an assessment of the structure of morbidity by sex for the entire period and in dynamics. Testing for differences was performed using the nonparametric Mann–Whitney U test and Chi-square test with Yates correction. Results. 831 new cases of central serous chorioretinopathy were registered in Kazan during 2009–2018, the ratio of men and women was approximately 1:1. In the dynamics of morbidity, the proportion of men increased from 24.2% in 2009 to 60.7% in 2018 (р=0.000002), while the proportion of women decreased from 75.8% in 2009 to 39.3% in 2018 (р=0.000002). The long-term dynamics for 2009–2018 is characterized by a statistically significant increase in the incidence rate of central serous chorioretinopathy in men (p=0.004) from 3.2 per 100 000 in 2009 to 14.8 per 100 000 in 2018. During the study period, the incidence rate in women remains at the same level, varying from 5.4 per 100 000 to 8 per 100 000 (p=0.663). Men are more likely to have central serous chorioretinopathy at a younger age (р=0.0001). The median age at the time of diagnosis in women was 55 years (Q25–Q75 45–65 years), in men — 45 years (Q25–Q75 37–56 years). Conclusion. From 2009 to 2018, the incidence rate of central serous chorioretinopathy among men in Kazan significantly increased in both intensive (p=0.004) and extensive indicators (p=0.000002); сentral serous chorioretinopathy in men develops at an earlier age compared with women (median age of women at the time of diagnosis was 55 years, median age of men — 45 years, p=0.0001).