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To clarify the time dependency of risk factors for the development of diabetic nephropathy, we applied Poisson regression to the analysis of 7167 person-year data in 1447 patients with non-insulin-dependent diabetes mellitus (NIDDM) who were initially free of proteinuria. Significant predictors were found to be annual mean fasting blood glucose (FBG) level, male gender, duration, and age at diagnosis. Hyperglycemia was more influential, while duration was less in the previous year of development of proteinuria than at the initial visit. When more information during longer-year data was used as average, the contribution of FBG level was enhanced. Current age was less associated than was age at diagnosis. Thus, Poisson regression seems to be useful for the analysis of risk variables in chronic diseases.

OBJECTIVE To identify the mortality rate from coronary heart disease (CHD) in diabetic Japanese by directly comparing the Tokyo University Hospital cohort and the Joslin cohort using identical protocols. RESEARCH DESIGN AND METHODS Five hundred thirty-eight diabetic patients who were treated at Tokyo University Hospital with a 35- to 62-year age range at entry and with a diabetes duration of RESULTS The percentage of patients who survived at the end of the 24-year period was higher in the Tokyo University cohort (42%) than in the Joslin cohort (12%). The percentage of patients who died from CHD was remarkably lower in the Tokyo University cohort (11%) than in the Joslin cohort (39%). The CHD mortality rate was lower in the Tokyo University cohort than in the Joslin cohort, regardless of the duration of diabetes. CONCLUSIONS Our study confirmed the previous finding that the CHD mortality is lower in diabetic Japanese than in diabetic Caucasians.