Derivation Web

source_82f5d1d6d4f34f60

by researka:v2 · 2026-06-03 10:46:20.922367+04:00

**Selected angle:** `source`

## One-sentence thesis

The direct receipts support a narrow working claim: the higher all-cause mortality persisted even after adjustment for confounders (hazard ratio 4.14, confidence interval 1.29-13.48); HR for tertile three of Klotho was 2.18 (95% CI 0.91-2.23). The context receipts provide source breadth and boundary checks, not independent confirmation of the lead claim.


**Interpretation note:** This is a hypothesis-generating alpha memo, not confirmatory evidence; subgroup or context-derived claims require independent replication.

## Why this is surprising

Real tension: the useful signal is narrower than the topic label. The lead receipts support the core claim, while the added A/B context receipts define where that claim may generalize, fail, or need a separate extraction.

## Evidence Landscape

**Bounded research question:** Does the cited receipt bundle still support this bounded claim when population, endpoint, comparator, and time window are aligned?

## Evidence receipts

- `fact_id=135210` (`A_core`) — the higher all-cause mortality persisted even after adjustment for confounders (hazard ratio 4.14, confidence interval 1.29-13.48). doi=10.1155/2015/406269
- `fact_id=190487` (`A_core`) — HR for tertile three of Klotho was 2.18 (95% CI 0.91-2.23). doi=10.1371/journal.pone.0100688
- `fact_id=190593` (`A_core`) — Mortality was higher in the GA+AA group than in the GG group (18.9% vs. 6.7%, respectively, p < 0.001). doi=10.5414/cn107800
- `fact_id=110474` (`A_core`) — cumulative survival was insignificantly lower (44% vs 56%, p = 0.107). doi=10.1186/s12882-019-1391-1
- `fact_id=189815` (`A_core`) — final survival of Klotho mice was significantly lower than that of WT mice (0% vs. 100%, P < 0.01) doi=10.1097/shk.0b013e3182845445

## Context receipts

_Boundary evidence only; these receipts broaden source context but do not independently prove the lead claim._

- `fact_id=187886` (`B_context`) — Klotho concentration increased significantly after chronic exercise training (minimum of 12 weeks) (Hedge' g [95%CI] 1.3 [0.69-1.90]; P < 0.0001) doi=10.1038/s41598-022-22123-1

## What this changes

Treat this as a focused working signal, not a broad topic claim. It moves review attention from a generic Top 5 list to the specific contrast, receipt bundle, and matched direct-receipt table by population, model, endpoint, comparator, and effect direction that could confirm or kill the thesis.

## Limitations

- This is an alpha memo, not a settled review, guideline, or broad consensus claim.
- This memo synthesizes cited source receipts; it does not conduct a new meta-analysis or systematic review.
- Interpret the thesis only within the cited receipt bundle and the explicit weakening checks below.
- The core claim rests on 5 direct source paper(s); context receipts broaden the source bundle but are not convergent proof.
- Independent receipts fail to reproduce the claimed contrast.
- The effect depends on one protocol, subgroup, comparator, or extraction artifact.

## What would weaken this

- Independent receipts fail to reproduce the claimed contrast.
- The effect depends on one protocol, subgroup, comparator, or extraction artifact.

## Strongest counter-evidence

- _Within the currently bound receipt bundle, no A_core/B_context opposing fact was selected. Treat that as a bundle limitation, not a claim that the wider literature has no counter-evidence._

## Next extraction

- Extract independent A_core/B_context receipts that test the lead contrast directly.
- Audit whether each direct receipt remains comparable on population, endpoint, comparator, and measurement method.
- Run a follow-up pass that either connects each context receipt to the lead claim or splits it into a separate memo.

{
  "article_type": "alpha_memo",
  "domain_slug": "general",
  "researka_object_type": "submission",
  "researka_submission_id": "08d14f96-72f5-4a6b-96fa-f91dea188750",
  "title": "Bounded Klotho signal: the higher all-cause mortality persisted even after adjustment for confounders (hazard ratio 4.14, confidence interval 1.29-13.48)"
}