Association of anticholinergic cognitive load with the appointment of potentially not recommended drugs and the frequency of hospitalization of elderly and senile patients

Abstract

Actuality . The pharmacotherapy practice in elderly and senile patients is characterized by a widespread use of drugs with anticholinergic properties. Available data indicate that the combined anticholinergic cognitive burden correlates with the risk of adverse events and may serve as a factor in increasing the frequency of hospitalization in elderly patients. Objective. To examine the prevalence of anticholinergic medications and factors associated with anticholinergic cognitive burden in this study population. Methods. A retrospective pharmacoepidemiological analysis of medical records of 401 patients >65 years of age, hospitalized in Moscow in the period from 1st of June to 30th of December, 2017, was performed. Anticholinergic drugs were identified using Anticholinergic Cognitive Burden Scale (ACB) [Anticholinergic cognitive burden scale. Aging Brain Care. 2012 Update Developed by the Aging Brain Program of the Indiana University Center for Aging Research]. Binary logistic regression was applied to identify significantly the factors associated with anticholinergic medication use in the study population. Data were presented using odds ratios with 95 % confidence intervals. Results. Four hundred one patients were included in the analysis, with a mean age of 77.4 (±7.2) years, 72.1 % were female, the median (IQR) of comorbidities per patient was 3 (0-5), the median of the number of prescribed medications per patient was 2 (0-4). The most common pathological conditions included chronic heart failure, hypertension, cerebrovascular disease, coronary heart disease. Polypharmacy was observed in 36.7% of patients. according to the ACB scale, 41.9 % of patients were exposed to ACB-contributing medicines (95 % CI: 41.1-42.7). Mean ACB score was 0.71 ± 0.06 (IQR 1-7). The most commonly prescribed ACB- contributing medications were cardiovascular agents — 51.47 %; and oral anticoagulants — 23.4 %. The odds of ACB exposure was 1.47 (CI 95 % = 1.33-1.63). The prescription of drugs with anticholinergic burden was not associated with an increase in the frequency of hospitalization (OR: 0.83, p = 0.089). Patients with ACB>0 had higher levels of potentially inappropriate medications (PIMs) (OR: 1.29, p = 0.02). An association of polypharmacy with high ACB scores was found (p = 0.001). No association was observed between potentially prescribing omission (PPOs), age and gender with Anticholinergic burden (ACB). Conclusions. Pharmacotherapy analysis of elderly and senile patients showed high prevalence rates of prescribing drugs with potential anticholinergic effects of level 1 according to ACB scale). There was no association between prescribing anticholinergics with an increased risk of hospitalization and the number of concomitant diseases.