Is living alone associated with mortality among older primary care patients with or without diabetes?

Aims: The aim of this study was to evaluate the association between living alone and mortality among older patients with and without diabetes.

Methods: Electronic patient records were used to identify patients at least 65 years of age with a diagnosis of diabetes and two age- and sex-matched controls without diabetes for each patient with diabetes in 2015. The study population in this analysis consisted of 429 patients with diabetes and 650 controls who returned a questionnaire that contained questions about their diseases, symptoms, and functions. The mortality (2015-2019) data were based on the national registry of Statistics Finland. Cumulative mortality was estimated with Kaplan-Meier's method and compared with the log-rank test. Cox proportional hazards regression was used to estimate the adjusted hazard ratios (HR) and their 95% confidence intervals (CI).

Results: The median follow-up time was 4.3 years. 208 of the controls (32%) and 156 (36%) of the patients with diabetes lived alone. Of the controls, 8.1% (95% CI 5.9-11.1) of those not living alone and 20.2% (95% CI 15.3-26.3) living alone died. The corresponding numbers for patients with diabetes were 15.1% (95% CI 11.3-19.8) and 28.8% (95% CI 22.4-36.7). Among all patients, living alone was associated with increased mortality (HR = 1.84; 95% Cl 1.30-2.61), whereas the diagnosis of diabetes was not (HR = 1.31; 95% Cl 0.94-1.81).

Conclusions: The results of this study show that living alone had a significant impact on the mortality of older patients, regardless of whether they had diabetes or not. Diabetes was not clearly associated with the increased mortality among these older home-dwelling patients.