Health-related quality of life (HRQoL) was reportedly associated with mortality; however, these studies used questionnaires with relatively large number of items ranging from 20 to 30. We thus evaluated the prospective association between HRQoL measured by Short-Form (SF)-8, a short version of SF-36, in Japanese individuals with type 2 diabetes. Longitudinal data of 3,269 individuals with diabetes were obtained from a large Japanese diabetes registry. To assess the independent correlation between the 10-point increment of SF-8 physical component summary score (PCS) or mental component summary score (MCS) and all-cause mortality, the Cox proportional hazards model was used with adjustment for age, sex, body mass index, HbA1c, types of diabetes therapy, urinary albumin-creatinine ratio, history of diabetic retinopathy, symptomatic diabetic neuropathy, and past medical history (acute myocardial infarction, chronic stable angina, peripheral artery disease, leg ulceration, ischemic stroke, and hemorrhagic stroke). The mean age, body mass index, and HbA1c level were 64.9 years (SD 11.2), 24.6 kg/m2 (SD 3.9), and 7.5% (SD 1.2) [or 58.6 mmol/mol (SD 12.7)], respectively. We recorded 248 deaths during the median follow-up of 6.1 years (incidence ratio = 14.0/1,000 person-years). We observed significant association of PSC score and all-cause mortality, and multivariable-adjusted hazard ratio (HR) was 0.775 [95% confidence interval (CI), 0.668-0.899; p = 0.001] per 10-point increment of PCS score. We did not observe significant association between MCS score and all-cause mortality [HR = 0.864 (95% CI, 727-1.027; p = 0.097)].

In conclusion, higher PCS of SF-8, not MCS, was associated with lower risk of all-cause mortality in Japanese individuals with type 2 diabetes. SF-8 could be useful for predicting mortality in individuals with diabetes.


Y. Hayashino: Speaker's Bureau; Self; Astellas Pharma Inc., Kowa Pharmaceuticals, Kyowa Hakko Kirin Co., Ltd., MSD K.K., Ono Pharmaceutical Co., Ltd. S. Okamura: None. H. Ishii: None.


Manpei Suzuki Diabetes Foundation; Japan Society for the Promotion of Science (25460641)

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