Mobility speed predicts new-onset hypertension: a longitudinal study.

OBJECTIVE

The aim of this study was to investigate whether declining mobility and muscle strength predict new-onset hypertension in suburban-dwelling elderly individuals.

METHODS

This study was designed as a longitudinal prospective cohort study. It was comprised of 362 individuals (mean age = 67.8 ± 6.2; 157 men) without hypertension at baseline. At baseline, all participants completed health questionnaires and underwent measurements of mobility [the Timed Up and Go test (TUGT) and 4-m walking test] and muscle strength (grip strength). At 1-year follow-up, we determined the number of participants who had developed new-onset hypertension. We then evaluated the relationship between above metrics and the development of hypertension.

RESULTS

In the present study, 94 (26.0%) participants developed hypertension after 1 year. After adjusting for mixed factors, the TUGT scores [hazard ratio = 1.15; 95% confidence interval (CI), 1.10-1.31; P = 0.030] were positively associated with the development of hypertension, while the 4-m walking test scores (hazard ratio = 0.07; 95% CI, 0.01-0.47; P = 0.007) showed an inverse relationship with hypertension incidence. Grip strength (hazard ratio = 1.03; 95% CI, 0.99-1.06; P = 0.098) was not significantly associated with hypertension incidence.

CONCLUSION

Our results indicate that people with declining mobility are significantly more likely to develop hypertension. Hence, improving mobility could be protective against hypertension for elderly individuals.