Prevalence and patterns of comorbidities in older people with type 2 diabetes in Australian primary care settings

Objective

The aim of this study was to identify the prevalence and patterns of comorbidity in community-dwelling older people with type 2 diabetes mellitus (T2DM) attending general practice settings in Australia.

Methods

This study involved a cross-sectional analysis using the Bettering the Evaluation and Care of Health (BEACH) sub-study data. In a series of sub-studies, a representative sample of general practitioners was asked to record all diagnosed chronic conditions for patients at 40 consecutive encounters using structured paper-based recording forms. The dataset was analysed with descriptive analyses, and exploratory factor analyses were applied to examine comorbidity patterns.

Results

Of the 14,042 patients aged 65 years or older, 2688 had a diagnosis of T2DM (19%). Of the 2688 patients with T2DM, hypertension was present in 67% (95% CI: 64.6–70.0), followed by arthritis 52% (95% CI: 48.8–54.8), hyperlipidaemia 45% (95% CI: 41.8–47.9), ischemic heart disease, 23% (95% CI: 20.7–24.9), depression 16% (95% CI: 48.8–54.8), atrial fibrillation 10% (95% CI: 8.9–11.6), congestive heart failure 7% (95% CI: 6.0–8.1), stroke/cerebrovascular accident 7% (95% CI: 5.4–8.2) and peripheral vascular disease 5% (95% CI: 4.4–6.2). We identified two comorbidity patterns among older people with T2DM. The first were psychological and musculoskeletal conditions and the second were cardiovascular conditions and chronic renal failure.

Conclusions

The prevalence of cardiovascular and non-cardiovascular comorbidities in community-dwelling older people with T2DM was high. Adequate primary care strategies should be in place to support the long-term care for this population.