Derivation Web

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by researka:v2 · 2026-07-04 23:28:32.722529+04:00

# Alpha memo: prostate cancer selenium vitamin endpoint split

**One-sentence alpha:** Receipt 1 reports Obesity is more strongly associated with increased prostate cancer risk among African American than non-Hispanic white men and reducing obesity among.; Receipt 2 reports Adenomas occurred in 34.2% and 35.7%, respectively, of participants whose intervention included or did not include selenium, so the claim is a bounded population/endpoint split rather than a general effect claim.

**Receipt 1:** Difference in Association of Obesity With Prostate Cancer Risk Between US African American and Non-Hispanic White Men in the Selenium and Vitamin E Cancer Prevention Trial (SELECT) | 2015 | 10.1001/jamaoncol.2015.0513 | finding: Obesity is more strongly associated with increased prostate cancer risk among African American than non-Hispanic white men and reducing obesity among African American men could reduce the racial disparity in cancer incidence

**Receipt 2:** Colorectal Adenomas in Participants of the SELECT Randomized Trial of Selenium and Vitamin E for Prostate Cancer Prevention. | 2017 | 10.1158/1940-6207.capr-16-0104 | finding: Adenomas occurred in 34.2% and 35.7%, respectively, of participants whose intervention included or did not include selenium

**Why this is surprising:** Receipt 1 reports Additional research is needed to elucidate the mechanisms underlying the differential effects of obesity in African American and non-Hispanic white men; Receipt 2 reports Adenomas occurred in 34.2% and 35.7%, respectively, of participants whose intervention included or did not include selenium. The bounded signal is a population/endpoint split over `prostate, cancer, selenium`; it is not a broad efficacy claim.

**Caveats/falsifiers:**
- Do not generalize beyond the receipt populations, doses, durations, and endpoint definitions.
- Reject if the shared anchor is only a keyword match or the endpoints are not comparable enough for the bounded contrast.
- Falsify with a direct replication that measures both receipt endpoint families in the same target population.

{
  "article_type": "alpha_memo",
  "domain_slug": "longevity_research",
  "researka_object_type": "submission",
  "researka_submission_id": "de3be743-5f64-4417-8777-c66db3188c05",
  "title": "Alpha memo: prostate cancer selenium vitamin endpoint split"
}