Pith Number

pith:UBS25CSF

pith:2026:UBS25CSFUCYQVM7ER4GBI7LXMN

not attested not anchored not stored refs pending

Quantifying Rodda and Graham Gait Classification from 3D Makerless Kinematics derived from a Single-view Video in a Heterogeneous Pediatric Clinical Cohort

Anita Bagley, Hyeokhyen Kwon, Jeremy Bauer, Joseph Krzak, Karen Kruger, Lauhitya Reddy, Maura Eveld, Ross Chafetz, Seth Donahue, Susan Sienko, Vedant Kulkarni

A markerless pipeline from single-view video quantifies Rodda and Graham knee and ankle z-scores with R² of 0.80 for knees against 3D gait analysis in 152 children.

arxiv:2605.11314 v2 · 2026-05-11 · cs.CV · cs.AI

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\usepackage{pith}
\pithnumber{UBS25CSFUCYQVM7ER4GBI7LXMN}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Across 1,058 bilateral limb samples from 529 trials of 152 children, the sagittal-view model achieved R² = 0.80 ± 0.02 and CCC = 0.89 ± 0.02 for knee z-scores and R² = 0.57 ± 0.02 and CCC = 0.72 ± 0.02 for ankle z-scores against 3D-IGA.

C2weakest assumption

That single-view 2D video kinematics can be mapped reliably to the 3D-IGA z-scores used as ground truth, particularly for ankle measurements where performance is lower, and that the heterogeneous cohort (60 diagnoses) generalizes to new patients.

C3one line summary

A single-view video model estimates knee z-scores with R²=0.80 and ankle z-scores with R²=0.57 against 3D-IGA ground truth, supporting screening and longitudinal tracking in a heterogeneous pediatric cohort.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-22T01:04:55.544790Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a065ae8a45a0b10ab3e48f0c147d77636588b14ad759c676d2b947bdd0cd3510

Aliases

arxiv: 2605.11314 · arxiv_version: 2605.11314v2 · doi: 10.48550/arxiv.2605.11314 · pith_short_12: UBS25CSFUCYQ · pith_short_16: UBS25CSFUCYQVM7E · pith_short_8: UBS25CSF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UBS25CSFUCYQVM7ER4GBI7LXMN \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a065ae8a45a0b10ab3e48f0c147d77636588b14ad759c676d2b947bdd0cd3510

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6922226cbdf54e62d6dcaf8191ae57a95626551baf69ed6e5f9135651b4ae936",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-05-11T23:04:08Z",
    "title_canon_sha256": "47f9dca917c0a12e7110f968947d8cf170ed0770a9233d158afa2c6412afb281"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.11314",
    "kind": "arxiv",
    "version": 2
  }
}