Who was studied 221,596 European ancestry cases, 1,564,466 European ancestry controls.
The effect
Each copy of the T allele shifted the measure 0.101 higher (95% confidence interval 0.077-0.125); p = 8 × 10−17.
How common The T allele had a frequency of about 2% in the people studied.
Where it sits Chromosome 1, band 1p33 — a missense change in SPATA6.
What each result means
C/CPublished research associates this genotype with typical/baseline likelihood of Hypothyroidism — no copies of the reported risk allele.
C/TPublished research associates this genotype (one copy of the reported risk allele) with an intermediate association with Hypothyroidism.
T/TPublished research associates this genotype (two copies of the reported risk allele) with a higher likelihood of Hypothyroidism compared to the general population.
Nature genetics · 2026 · PMID 41644669 · open access
Questions about rs77303590
What is rs77303590?
rs77303590 is a single position in the genome, in or near the SPATA6 gene. Published research associates it with hypothyroidism. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
What conditions is rs77303590 linked to?
On MyGeneLog this position is linked to Hypothyroidism. The research behind each link, and its sources, are set out on that condition page.
Does having rs77303590 mean I will get this?
No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.
Where does the information about rs77303590 come from?
GWAS Catalog, Nature genetics 2026, PMID:41644669. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
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