The association of dyslipidemia and obesity with glycated hemoglobin

Background

Dyslipidemia and obesity are the most common complex metabolic disorders taking the highest toll of health resources globally by its increasing incidences. This consequently leads to type 2 diabetes mellitus (T2DM) and cardiovascular disorders (CVDs) with variable reports about the role of metabolic factors on glycemic control. The current study is designed to determine the association of dyslipidemia and obesity with glycated hemoglobin (HbA1c) in T2DM and non-diabetic subjects.

Methods

The present study was carried out in 931 subjects from urban Western India including 430 diabetic and 501 non-diabetic subjects with detailed anthropometric parameters. All subjects were investigated for HbA1c and lipid parameters like TC, TG, HDL-C, LDL-C and non-HDL-C.

Results

Dyslipidemia, central- and peripheral- obesity were observed (50.27 %; 75 % and 59.83 %) in all the study subjects respectively. Additionally, hyper-non-HDL-C was detected in 23.49 % and 22.56 % in T2DM and non-diabetic subjects. Significant linear associations of hyper-TC, hyper-LDL-C and hyper-non-HDL-C were observed with HbA1c in T2DM and non-diabetic control subjects respectively. Centrally- and peripherally- obese dyslipidemic subjects also showed a significant association with HbA1c in T2DM and control subjects respectively.

Conclusion

This study demonstrates the high prevalence of dyslipidemia and obesity in all subjects irrespective of their disease status in a Western Indian population. The dyslipidemic obese subjects had significant linear association with HbA1c in T2DM subjects.

Does vitamin D play a significant role in type 2 diabetes?

BACKGROUND

Vitamin D deficiency reportedly is associated with type 2 diabetes (T2DM). We aim to examine whether 25-hydroxyvitamin D (25OHD) has clinically significant influence on hemoglobin glycation (HbA1c) and insulin resistance (HOMA-IR) in T2DM subjects.

METHODS

Present study was carried out in 912 subjects (429 T2DM cases and 483 non-diabetic controls) from Western India. The enrolled study subjects were investigated for biochemical parameters like FBS, PPBS, HbA1c, FI, HOMA-IR and 25OHD levels in blood.

RESULTS

Vitamin D deficiency was seen in 91.4% and 93.0% of T2DM cases and control subjects respectively. There was no association of serum 25OHD deficiency on HbA1c or HOMA-IR in T2DM cases (p = 0.057 & p = 0.257 respectively) and in control subjects (p = 0.675 & p = 0.647 respectively).

CONCLUSION

Our findings suggests that though vitamin D deficiency is prevalent in T2DM and non-diabetic subjects, its role in hemoglobin glycation and insulin resistance could not be established.