Frailty, Physical Function and Driving Status in Older Adults: LongROAD Analysis of the National Health and Aging Trends Study
archive: archived pipeline: cataloged verified
Get this paper ↗ (full text — opens at the source; we link to it, we don't host it)
Summary
This study investigates the association between physical frailty, lower extremity physical functioning, and driving status in older adults. Using data from the National Health and Aging Trends Study (NHATS), the research aims to determine whether frailty and poor physical function are linked to becoming or remaining a non-driver. The findings suggest that these health metrics may serve as useful screening tools to identify older adults at risk of driving cessation, potentially allowing for proactive interventions such as targeted physical activity programs to help maintain driving ability. The analysis utilized a nationally representative sample of U.S. Medicare beneficiaries aged 65 and older from four annual waves of data (2011–2014). The study included 6,288 participants for frailty analysis and 5,935 for physical functioning analysis. Frailty was assessed at baseline (2011) using Fried’s phenotype, which categorizes individuals as frail if they exhibit three or more of five criteria: weakness, slowness, exhaustion, low physical activity, and shrinking. Physical functioning was measured annually using the Short Physical Performance Battery (SPPB), which evaluates standing balance, walking speed, and repeated chair stands, yielding a score from 0 to 12 categorized as poor (0–5), fair (6–9), or good (10–12). Driving status was defined based on self-reported driving within the past year. Statistical modeling employed generalized estimating equations with weighted data, adjusting for covariates including age, gender, race, living arrangement, dementia, and comorbidity. The results demonstrated significant associations between health status and driving cessation. Among the cohort, 15% were classified as frail at baseline. Frail participants had an incidence rate of becoming a current non-driver that was 1.80 times higher than that of non-frail participants after adjustment (an 80% increase). Regarding physical functioning, 19% of participants had poor SPPB scores in 2011. Participants with poor SPPB scores had an incidence rate of being a current non-driver 2.01 times higher than those with good scores (a 101% increase), while those with fair scores had a rate 1.31 times higher (a 31% increase). These associations remained statistically significant after controlling for other relevant variables. The study concludes that both frailty and poor lower extremity physical functioning are strong predictors of driving cessation in older adults. The authors suggest that poor SPPB scores may act as a predisposing factor, making individuals vulnerable to cessation, which may then be triggered by intervening illnesses or injuries. While the study is limited by the lack of precise cessation dates and potential misclassification of current drivers, it highlights the utility of frailty and SPPB measures in identifying at-risk drivers. The implications suggest that identifying these risks early could facilitate interventions, such as physical activity programs, to help older adults maintain safe driving capabilities for longer periods.
Key finding
In adjusted analyses of NHATS (2011–2014), frail older adults had 1.80 times the incidence rate of becoming current non-drivers compared with non-frail adults, and those with poor SPPB scores had 2.01 times the rate of being current non-drivers compared with good SPPB scores.
Methodology
modeling
Sample size: n=6,288 (frailty analysis); n=5,935 (SPPB analysis)
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_aaa_foundation on 2026-05-23 (5 acquisition events logged).
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | aaa_foundation | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 19 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.