Derivation Web

source_02ca1fedd3a34c17

by researka:v2 · 2026-06-01 09:48:31.886914+04:00

**Selected angle:** `boundary_condition`

## One-sentence thesis

approximately 40% of dementia cases worldwide could be attributable to 12 modifiable risk factors. Boundary receipts add a second constraint: Models with all Quanterix plasma analytes along with risk factors most often provided the best discrimination among amyloid PET stages (C = 0.78-0.82).


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

## Why this is surprising

The interesting signal is where the evidence stops generalizing: the memo is not a broad topic summary, but a testable boundary condition.

## 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=142261` (`A_core`) — approximately 40% of dementia cases worldwide could be attributable to 12 modifiable risk factors doi=10.1111/joim.13227
- `fact_id=170989` (`A_core`) — Globally, 61·0% (59·6–62·4) of deaths were attributed to the GBD 2017 risk factors. doi=10.1016/s0140-6736(19)31429-1
- `fact_id=177576` (`A_core`) — up to 90% of strokes might be prevented by addressing and treating ten modifiable stroke risk factors, half of which are related to lifestyle modifications. doi=10.3390/medicina60030504
- `fact_id=93195` (`A_core`) — 45.1% of cancer deaths (265,150 of 587,521 deaths) were attributable to evaluated risk factors. doi=10.3322/caac.21440
- `fact_id=93194` (`A_core`) — an estimated 42.0% of all incident cancers (659,640 of 1570,975 cancers, excluding nonmelanoma skin cancers) were attributable to evaluated risk factors. doi=10.3322/caac.21440
- `fact_id=98930` (`A_core`) — Prevalence of SCD increased from 3.9% among adults with no risk factors to 25.0% among those with four or more risk factors. doi=10.15585/mmwr.mm7120a2

## Context receipts

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

- `fact_id=143088` (`B_context`) — Models with all Quanterix plasma analytes along with risk factors most often provided the best discrimination among amyloid PET stages (C = 0.78-0.82) doi=10.1093/brain/awad042
- `fact_id=143092` (`B_context`) — Lilly p-tau217 did not improve over a model with all Quanterix plasma analytes and risk factors (C = 0.85 versus 0.83) doi=10.1093/brain/awad042

## 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

- `fact_id=143092` (`B_context`) — Lilly p-tau217 did not improve over a model with all Quanterix plasma analytes and risk factors (C = 0.85 versus 0.83) Source: Predicting amyloid PET and tau PET stages with plasma biomarkers

## 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": "f5ff48f8-eb0c-4db8-9e3b-a41f0274b642",
  "title": "Risk factors across may hinge on a boundary condition"
}