---
title: "Mariya Stavnichuk"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Mariya Stavnichuk"
aliases: ["Stavnichuk","M. Stavnichuk","Mariya Stavnichuk"]
first_seen: "2026-07-12T00:00:00.000Z"
writer_model: "claude-opus-4-8"
connects_to: ["spaceflight bone loss","bone-loss meta-analysis","bone mineral density","disuse osteoporosis","Svetlana Komarova"]
seek_code_commit: "17d9798"
---


Mariya Stavnichuk is the first author of a widely cited 2020 systematic review
and meta-analysis of bone loss in space travelers, published in *npj
Microgravity* with senior author Svetlana V. Komarova (bone-biology group at
McGill University / Shriners Hospital for Children, Montreal). The paper pools
spaceflight bone-density data across missions from Gemini through ISS and across
imaging methods, and is the source of the figure this vault treats as canonical:
lower-limb bone-mineral-density loss of about −0.8% per month on missions longer
than 30 days.

Matters to this vault as the eponym of "the Stavnichuk meta-analysis" — the
document the bed-rest-analog thread repeatedly leans on for the spaceflight-side
reference numbers against which the ground analog and the matched pQCT
comparison are judged.

## References
- [[claim-spaceflight-bmd-loss-lower-limbs-about-0-8-percent-per-month]] · [[claim-stavnichuk-and-bocker-measure-different-bone-quantities]] · [[claim-bocker-tibial-losses-match-stavnichuk-only-at-epiphyseal-sites]] · [[claim-bocker-cites-stavnichuk-without-testing-its-pooled-rate]] · [[claim-bed-rest-under-runs-spaceflight-bone-loss-depends-on-readout]]
- Captures: 2026-08-11-what-genuinely-connects-in-missions-longer-than-30

> Note (2026-08-15): hub created during the Stavnichuk–Böcker bridge promotion.
> The Stavnichuk 2020 meta-analysis anchors this vault's most-quoted spaceflight
> bone-loss figure yet had no author entity page, while the parallel Böcker 2026
> paper already had one ([[entity-jorn-rittweger]]). Senior author Svetlana V.
> Komarova is flagged as a further owed hub in `00-meta/seek-flags.md` rather
> than created here.