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Genome-wide association study of depression symptoms using online self-questionnaires in the Russian population cohort: preliminary results
Introduction: Depression is a chronic, recurrent mental disorder with a moderate level of genetic impact. Modern GWAS of depression require extra-large sample sizes and new effective, clinically sensitive, objective and simple to fill online phenotyping tools for population studies are necessary today.
Objectives
Aim: to test online phenotyping tools based on clinical and psychometric instruments to evaluate depressive symptoms in population cohort for using in GWAS
Methods
Participants: 2610 Russian-speaking respondents-clients of Genotek Ltd., provider of genetic testing services in Russian Federation. The online survey included HADS-D (Hospital Anxiety and Depression Scale-depression subscale), original questionnaire adapted for self-report from major depression DSM-5 criteria, questions about sex and age. Three research phenotypes were defined: quantitative “HADS-D score” and two categorical “HADS-D depression”(cut-off 8 points)-20.63%,“DSM depression” 16.73%. DNA samples obtained from saliva were genotyped on Illumina Infinium GSA v1. 0/v2. 0/v3. 0 microarrays. GWAS analysis was performed independently for each of the research phenotypes.