Type 2 & other diabetes

Trajectories of fasting glucose and glycated haemoglobin in obese and non‐obese incident diabetes: Results from two large cohort studies

Diabetes Obes MetabPublished Analysis of two longitudinal cohort studies

Authors' conclusion

Obese and non-obese diabetes developments may share a similar FPG but distinct HbA1c trajectory. Obese diabetes interventions require more attention to cardiometabolic risks. Moreover, studies addressing weight/sex-related differences in diabetes aetiologies and treatments are warranted.

Study context

Population
Participants without diabetes and BMI 18.5–40 kg/m² at baseline, China Health and Retirement Longitudinal Study (CHARLS) and English Longitudinal Study of Ageing (ELSA); incident diabetes (mean age 61.4 years; male 46.2%)1,361 incident diabetes
Participants
11,925 participants
Exposure
Obese vs non-obese incident diabetes
Outcome
Difference in FPG/HbA1c trajectory before T2D diagnosis by obesity status
Follow-up
Within 15 years
Methodological detailsmixed-effects models
  • Mixed-effects models

Main finding

As reported in the abstract

SE = 0.642; non-significant
Fasting plasma glucose (FPG) slope difference (CHARLS) 0.149 mg/dl; P = 0.816
SE = 0.013; non-significant
FPG slope difference (ELSA) 0.013 mg/dl; P = 0.337
SE = 0.016; steeper increase with obese diabetes
HbA1c slope difference (CHARLS) 0.036 %; P = 0.021
SE = 0.014; steeper increase with obese diabetes
HbA1c slope difference (ELSA) 0.032 %; P = 0.027

Observational data: associations, not effects.

Further findings

Cardiometabolic risk at diagnosis

Obese diabetes showed higher diastolic blood pressure and C-reactive protein at diagnosis than non-obese diabetes

HbA1c trajectory by sex

Difference in HbA1c trajectory by weight status only significant in males
  • Sex-stratified analyses

Original publication

Trajectories of fasting glucose and glycated haemoglobin in obese and non‐obese incident diabetes: Results from two large cohort studies. Diabetes Obes Metab. Published 19 June 2023. doi:10.1111/dom.15173

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