Associations between living alone, social interactions, and physical performance differ by sex: Results from the Baltimore Hip Studies
Bibliographic record
Abstract
BACKGROUND: There is mixed evidence on whether living arrangements and social interactions are associated with poorer health outcomes after hip fracture repair. Distinct social profiles among male and female older adults may explain some of the differences. However, prior studies did not evaluate these differences by sex. This article aims to assess if the associations between living alone, social interaction, and physical performance differ by sex among hip fracture survivors. METHODS: This prospective cohort study is part of the Baltimore Hip Studies seventh cohort, with 168 male and 171 female hip fracture patients assessed at baseline (≤22 days after hospitalization) and at 2, 6, and 12 months post admission. Living arrangements and interaction with children or siblings and others in the past 2 weeks were collected at all visits. Physical performance was measured in the follow-up visits with the Short Physical Performance Battery (SPPB). Linear mixed models tested associations of living alone and social interaction with SPPB over time adjusted for age, education, comorbidities, physical functioning pre-fracture, cognitive function, self-rated health, and time. RESULTS: For men only, living alone was associated with worse performance (0.7 points lower SPPB scores, p = 0.05). Higher social interaction was associated with 0.8 and 1.2 point higher SPPB scores for men and women, respectively (p < 0.05). Visiting with friends was significantly associated with better function among males, while visiting with children or siblings was associated with worse SPPB among females. CONCLUSIONS: Living arrangements and types of social interaction are differentially associated with physical function for older men and women. Screening for social isolation/integration and including interventions that promote social interaction and participation should be considered in healthcare programs for hip fracture survivors.
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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 | 0.003 | 0.008 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".