Insulin resistance is associated with urinary albumin‐creatinine ratio in normal weight individuals with hypertension and diabetes: The REACTION study

BACKGROUND: The relationship between albuminuria and insulin resistance (IR) has not been clarified in previous studies. This study was conducted to examine whether IR is associated with albuminuria in subjects with diverse blood pressure and glycometabolism statuses. METHODS: This study included 34 136 participants whose data were drawn from a cross‐sectional survey named the 2011 REACTION study. The participants were divided into six groups. The urinary albumin‐creatinine ratio (UACR) and glomerular filtration rate (GFR) were used as markers of chronic kidney disease (CKD). Variance tests and logistic regression models were performed for homeostatic model assessment of insulin resistance (HOMA‐IR) in relation to UACR and eGFR. RESULTS: First, UACR levels and HOMA‐IR exhibited a positive correlation among participants (P < 0.05), and a negative correlation existed between GFR and HOMA‐IR (P < 0.05). Second, in the hypertension with diabetes group, in individuals whose body mass index (BMI) was 18.5‐24.0 kg/m(2), age was 50‐60 years old, low density lipoprotein cholesterol (LDL‐C) was 2.6‐3.4 mmol/L or high density lipoprotein cholesterol (HDL‐C) was 0.9‐1.55 mmol/L, HOMA‐IR was positively associated with UACR (P < 0.05). However, there was a negative correlation between GFR and HOMA‐IR in the hypertension with diabetes group in individuals whose BMI was 18.5‐24.0 kg/m(2) or whose age was over 65 years old (P < 0.05). CONCLUSIONS: In the context of different blood pressure and glycometabolism statuses, the positive correlation between UACR levels and HOMA‐IR was affected by BMI, age, LDL‐C, HDL‐C, and GFR. In patients with hypertension and diabetes, the early detection and intervention of IR and related risk factors in patients with normal BMI may reduce the occurrence of microalbuminuria and delay the progression of CKD.