A large-scale observational study to investigate the current status of diabetes complications and their prevention in Japan: research outline and baseline data for type 1 diabetes—JDCP study 2

The JDCP study is a large-scale, prospective observational study designed to elucidate risk factors for diabetic complications as they become manifest in Japanese type 1 and 2 diabetic patients in the course of their observation and follow-up. Of the 6338 patients enrolled in the study, all patients with type 1 diabetes (n = 394) were examined for baseline clinical characteristics, which were summarized as follows: men, n = 174 (44 %); mean age (men/women), 55.3/56.8 years; duration of diabetes, 11.9/11.1 years; and those with a family history of diabetes, 27.7 %/35.6 %; BMI, 22.4/21.8 kg/m² (P = 0.048); HbA1c, 7.9/7.7 %; those with HbA1c < 7 %, 23.1/26.9 %; SBP, 126.0/124.9 mmHg; and LDL-C, 106.1/107.7 mg/dL. Additionally, the insulin dose per patient was shown to be 33.0 U or 0.58 U/kg body weight with self-monitoring of blood glucose being used in 95.8 % of the patients.