CONCLUSIONS: Patients categorized as normal weight or obese with T2DM within a year of diagnosis of T2DM exhibit variably higher mortality outcomes compared with the overweight group, confirming a U-shaped association of BMI with mortality. Whether weight loss interventions reduce mortality in all T2DM patients requires study.

via Association Between BMI Measured Within a Year After Diagnosis of Type 2 Diabetes and Mortality.

Could we have another U shaped mortality curve?  Watch that BMI.