Visual Snow Syndrome Prevalence Among Young Adults in the Russian Federation: a Research Perspective.

Background: Visual snow syndrome (VSS) is a poorly understood neurological condition of unclear etiology, characterized by visual and non-visual symptoms that reduce quality of life. The objective of our study was to estimate the prevalence of young adults with visual snow in Russia.

Materials and methods: We conducted an online survey among 1,177 respondents over the age of 18 residing in Russia. The questionnaire was based on MIDAS, HIT-6, ICHD-3, GAD-7, CES-D.

Results: A total of 1085 individuals, divided into three groups: 48 participants with Visual Snow Syndrome (VSS), 36 participants with visual snow symptoms (VS), and 1001 participants without visual snow (control group). Tinnitus (p<0.001) and paresthesia (p<0.001) were more common in participants with VSS compared to the control group. VSS group also reported mood disorders more frequently than those in the other groups (29.2% VSS, 13.9% VS, 7.0% control, p<0.001). Additionally, VSS group exhibited more elevated anxiety levels on the GAD-7 scale compared to the other groups (p=0.005), suggesting a weak association between anxiety and VSS.

Conclusions: Diagnosed migraine, tinnitus, concentration problems, paresthesia, and verified psychiatric conditions were significantly more prevalent in the VSS group in our study. Tinnitus was significantly more frequent in the VS group. Diagnosed conditions across all ICD-10 classes were more frequently identified in the VSS group, with the strongest associations (moderate) found with ICD-10 codes: F80-F89 and F60-F69. Additionally ICD-10 codes F30-F39 were more frequently found in the VS group compared to the control group. Our study revealed that nearly all individuals with VSS in our sample (89.6%) had experienced symptoms for as long as they can remember. The prevalence of VS symptoms in Russia is 7.7% (6.2-9.3%) and VSS is 4.4% (3.2-5.7%).