COVID-19 phenotype definition

COVID-19 phenotype definition standardizes phenotype variables and supports genetic association analyses to identify host genetic determinants of SARS-CoV-2 susceptibility and COVID-19 severity.

Key Features:

• Phenotype data dictionary: Provides standardized phenotype variables to elucidate genetic influences on SARS-CoV-2 infection susceptibility and COVID-19 severity.
• COVID-19 Host Genetics Initiative integration: Operates within the COVID-19 Host Genetics Initiative to coordinate phenotype definitions across international studies.
• Global cohort aggregation: Aggregates data from up to 49,562 patients across 46 studies in 19 countries to increase power for genetic discovery.
• Genome-wide association meta-analyses: Incorporates results from three genome-wide association meta-analyses that identified 13 genome-wide significant loci associated with SARS-CoV-2 infection and severe COVID-19 manifestations.
• Integration of viral and host data: Enables integration of viral sequence data with human host genotype and clinical metadata to study host–pathogen interactions and variant distributions over time and space.
• Mendelian randomization analyses: Supports Mendelian randomization analyses implicating factors such as smoking and body mass index in severe COVID-19 outcomes.

Scientific Applications:

• Therapeutic target identification: Identifies genetic loci associated with COVID-19 outcomes to prioritize putative therapeutic targets.
• Risk factor analysis: Uses Mendelian randomization to assess causal roles of exposures such as smoking and body mass index in COVID-19 severity.
• Integrative surveillance and research: Correlates viral variant distributions with host phenotypes over time and space to inform surveillance and epidemiological studies.

Methodology:

Genome-wide association studies (GWAS), meta-analyses of GWAS results (three meta-analyses identifying 13 genome-wide significant loci), Mendelian randomization analyses, and integration of viral sequence data with human host genotype and clinical metadata, supported by international data sharing and integration.