DRUGS & AGING, cilt.39, sa.6, ss.477-484, 2022 (SCI-Expanded)
Background and Objective: Hypertension is the most prevalent chronic disease in older adults. Antihypertensive drug use increases with aging. In some studies, hypotension developing under antihypertensive medication use has been indicated as a potential risk factor for morbidity and mortality in older adults. Our objective was to assess the relationship between hypotension under antihypertensive treatment and incident hospitalization of nursing home residents.
Methods: We detailed blood pressure measurements of the previous 1-year period that were noted regularly at 2-week intervals and studied their mean values. The systolic blood pressure (SBP) and diastolic blood pressure (DBP) thresholds to define low SBP (<= 110 mm Hg) and DBP (<= 65 mm Hg) were derived from our previous study. We noted demographics, number of co-morbidities and regular medications, mobility status, and nutritional assessment via the Mini Nutritional Assessment Short Form.
Results: We included 253 participants (66% male, mean age 75.7 +/- 8.7 years). The prevalence of low SBP (<= 110 mmHg) and low DBP (<= 65 mmHg) was 34.8% and 15.8%, respectively. Among residents, 4% were bedridden, 15.8% wheelchair bound, 14.5% needing assistance for reduced mobility, and 62.7% were ambulatory. At a median of 15 months of follow-up, hospitalization incidence from any cause was 50.8% (n = 134). Incident hospitalization was more common in the group that had low DBP (odds ratio = 3.06; 95% confidence interval 1.02-9.15; p = 0.04) after adjusting for age, number of comorbidities and medications, mobility status, and nutritional status. Low SBP was not associated with hospitalization.
Conclusions: The low DBP (<= 65 mm Hg) during the previous year was associated with incident hospitalization of nursing home residents after adjustment for several factors. These findings indicate that lower DBP may be a causative factor for incident hospitalization. We need further studies to explore whether a correction of diastolic hypotension may decrease the hospitalization risk in this vulnerable population.