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Stands on its own.
Nothing else here links to this position yet — but the page above is the point: what the
research found, what each genotype means, and where it came from, in language you can
read. Links to conditions, drugs and the senses appear automatically if we write them.
What the study found
Who was studied 43,148 European ancestry individuals; replicated in 1,179 Central or South Asian individuals, 1,161 African ancestry individuals.
The effect
Each copy of the T allele shifted the measure 0.426 lower (95% confidence interval 0.33-0.52); p = 8 × 10−18.
How common The T allele had a frequency of about 23% in the people studied.
Where it sits Chromosome 1, band 1p34.2 — in an intron of SCMH1-DT.
What each result means
C/CNo copy of the version the research linked to Retinal thickness (pixel 68_124). This is the starting point the study compared everyone against.
C/TOne copy of the version the research linked to Retinal thickness (pixel 68_124). That is a smaller link than two copies.
T/TTwo copies of the version the research linked to Retinal thickness (pixel 68_124). That is the strongest link of the three results. A link in a study is not a diagnosis.
Nature communications · 2025 · PMID 39904976 · open access
Questions about rs12026778
What is rs12026778?
rs12026778 is a single position in the genome, in or near the SCMH1-DT gene. Published research associates it with retinal thickness (pixel 68_124). A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
Does having rs12026778 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 rs12026778 come from?
GWAS Catalog, Nature communications 2025, PMID:39904976. 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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