Cross-sectional and longitudinal associations between Life's Essential 8 and frailty in community-dwelling older adults

Key points

1. 01Every 10-point higher LE8 score was associated with 16% lower odds of prevalent frailty and 11% lower risk of incident frailty
2. 02The association followed a dose-response pattern, with the steepest benefit at low-to-moderate LE8 levels and a flattening at higher scores
3. 03Findings were consistent across both men and women
4. 04The protective effect persisted after adjusting for age, sex, education, drinking habits, hypertension, diabetes, heart disease, stroke, and cholesterol
5. 05Results suggest that improving cardiovascular health through lifestyle changes could be an effective primary care strategy for frailty prevention

How it was conducted

Design

Cross-sectional and longitudinal cohort study using routine health examination data (2018-2022)

Data source

National Essential Public Health Service Package (NEPHSP) registry, one administrative district in Shenzhen, China

Participants

59,654 for cross-sectional analysis; 57,742 for longitudinal analysis (adults aged 65 and above)

Exposure

Life's Essential 8 (LE8) score: average of eight metrics covering nicotine exposure, physical activity, diet, sleep health, BMI, blood lipids, blood glucose, and blood pressure (scored 0-100)

Outcome

Frailty defined by a 30-item frailty index (FI >= 0.20), with CVD-related deficit items excluded to avoid circularity

Statistical approach

Logistic regression for cross-sectional analyses; Cox proportional hazards models for interval-censored longitudinal data; restricted cubic splines for dose-response assessment

What they found

• Cross-sectional: fully adjusted OR for frailty in the highest vs lowest LE8 quartile = 0.68 (95% CI: 0.58, 0.78), p for trend < 0.001
• Cross-sectional: each 10-point increment in LE8 score was associated with a 16% reduction in frailty odds (OR 0.84, 95% CI: 0.80, 0.88, p < 0.001)
• Longitudinal: 1,365 incident frailty cases among 57,742 participants over a mean follow-up of 1.21 years (2.4% incidence)
• Longitudinal: fully adjusted HR for frailty in the highest vs lowest LE8 quartile = 0.73 (95% CI: 0.62, 0.87), p for trend = 0.003
• Longitudinal: each 10-point increment in LE8 score was associated with an 11% reduction in frailty risk (HR 0.89, 95% CI: 0.84, 0.94, p < 0.001)
• Subgroup analyses stratified by sex showed consistent results in both men and women
• Restricted cubic spline analysis confirmed a significant non-linear inverse association in the cross-sectional data (significant non-linearity test) and a linear inverse association longitudinally (non-linearity test p = 0.504)

Limitations

• Self-reported data for physical activity, smoking, diet, and other LE8 components may introduce recall bias or classification errors
• Dietary quality score could not be fully calculated due to limited detail on specific dietary factors in the database
• Participants were drawn from a single administrative district in Shenzhen, which may limit generalizability to other regions or countries
• Unmeasured confounders such as duration of residence and social support may contribute to residual confounding; short mean follow-up of 1.21 years limits assessment of long-term frailty incidence

Why it matters

For patients

Older adults can reduce their risk of becoming frail by improving modifiable cardiovascular health behaviors such as staying physically active, eating well, not smoking, getting adequate sleep, and managing blood pressure and blood sugar.

For clinicians

The LE8 score, already calculable from routine health check data, could serve as a simple screening tool in primary care to identify older patients at elevated frailty risk and guide targeted preventive interventions.

For readers

This large real-world Chinese cohort provides both cross-sectional and prospective evidence that cardiovascular health optimization is a viable population-level strategy for frailty prevention in aging communities.