Ambulatory Activity in Youth With Arthrogryposis
Bibliographic record
Abstract
BACKGROUND: Arthrogryposis is characterized by multiple congenital joint contractures that affect ambulation. This study compared ambulatory activity of subjects with the 2 most common forms of arthrogryposis and a control group of typically developing youth. METHODS: This is a cross-sectional, cohort study. Thirteen ambulatory subjects with amyoplasia or distal arthrogryposis and 13 age- and sex-matched controls wore the StepWatch3 Activity Monitor on their ankles for 7 days. The daily frequency, duration, and intensity of ambulatory activity were measured. The parents of the subjects also completed Activities Scale for Kids, Performance-38 questionnaires to compare parent-reported activity levels with StepWatch3 Activity Monitor measurements. RESULTS: The mean ages of the subject and control groups were 10.83 and 10.95 years, respectively, with 8 males and 5 females in each group. Subjects as compared with controls took significantly fewer steps, 5668+/-1134 versus 7685+/-1164, respectively (P=0.02) and spent significantly less of their active time at high step rates, 8% versus 13% (P=0.05). The average Activities Scale for Kids, Performance summary scores for subjects (76.8+/-18.9) were significantly lower than controls (90.6+/-7.2) (P=0.003). CONCLUSIONS: We have been able to quantify the activity levels of children with amyoplasia and distal arthrogryposis relative to that of age- and sex-matched typically developing youth. Youth with arthrogryposis took significantly fewer steps, spent less time at high activity levels, and had significantly lower parental report of ambulatory and physical activity than controls. LEVEL OF EVIDENCE: Cross-sectional comparison study, level II.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".