Abstract
Background contextPrevious studies on the risk and prevalence of diabetes among spinal cord injury (SCI) patients are limited and controversial. PurposeTo compare the risk and incidence rate (IR) of Type 2 diabetes in SCI and non-SCI patients. Study designThis is a population-based retrospective cohort study. Patient sampleData from Taiwan's National Health Insurance Research Database for the period 1997 to 2010 were analyzed. Patients aged 20 years and older newly identified with SCIs during this period were included in the SCI cohort. A non-SCI comparison cohort was randomly selected from National Health Insurance beneficiaries and matched with the SCI cohort based on age, sex, and index date. Outcome measuresBoth cohorts were followed until the first of the following occurred: the diagnosis of Type 2 diabetes (International Classification of Disease, Ninth Revision, Clinical Modification codes 250), withdrawal from the insurance system, the end of 2010, or death. MethodsA Cox proportional hazards regression analysis was used to estimate the risk of developing diabetes. ResultsTaiwan possesses an older SCI population, with a mean age of 51.6 years. The IR for diabetes in patients with and without SCIs was 22.1 per 10,000 person-years and 17.2 per 10,000 person-years, respectively. The adjusted hazard ratio (HR) for diabetes was 1.33 times higher in patients with SCIs than in those without SCIs. In patients with SCIs, men (adjusted HR=1.23, 95% confidence interval (CI)=1.04–1.44), older people (adjusted HR=4.26 in patients older than 65 years, 95% CI=3.16–5.74), patients with comorbidity (adjusted HR=1.36, 95% CI=1.14–1.62), and patients with a complete thoracic SCI (T-spine injury) (adjusted HR=2.13, 95% CI=0.95–4.79) were more likely to be diagnosed with diabetes than other patient subgroups. ConclusionsOur findings may facilitate the prioritizing of preventive health strategies and planning of long-term care for SCI patients.
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