Bishwajit Bhowmik

Increasing Prevalence of Type 2 Diabetes in a Rural Bangladeshi Population: A Population Based Study for 10 Years

Background To observe changes in the prevalence of type 2 diabetes mellitus (DM) and impaired fasting glucose (IFG) and its associated risk factors in a rural Bangladeshi population over a 10-year period. Methods Three cross-sectional studies were undertaken in a rural community (aged ≥20 years) in 1999, 2004, and 2009. Structured questionnaires including sociodemographic parameters, anthropometric measurements, blood pressure, and blood glucose values were recorded. DM and IFG were diagnosed using 1999 World Health Organization criteria. Results Age standardized prevalence of DM increased significantly (P<0.001) from 1999 to 2009 (2.3%, 6.8%, and 7.9% in 1999, 2004, and 2009, respectively). The prevalence of IFG increased significantly (P=0.011) from 4.6% to 5.8% between 1999 and 2004 but then decreased from 5.8% to 5.3% during 2004 to 2009. Significant linear trends were shown in both sexes for general and central obesity as indicated by body mass index, waist circumference, and waist hip ratio (WHR). Increasing age and systolic blood pressure were significant risk factors for DM in all three studies. WHR for males was also significantly associated with the risk of DM in all three studies. WHR for females was only significantly associated with DM in 2009. Conclusion A significant rise in the prevalence of DM was observed in this population over 10 years. This increase was seen in both sexes, and in all age groups. A significant increase in the prevalence of the associated risk factors of general and central obesity was observed in both sexes.

Prevalence of Type 2 Diabetes and Impaired Glucose Regulation with Associated Cardiometabolic Risk Factors and Depression in an Urbanizing Rural Community in Bangladesh: A Population-Based Cross-Sectional Study

Background To determine the prevalence of type 2 diabetes (T2DM) and impaired glucose regulation (impaired fasting glucose [IFG] and impaired glucose tolerance [IGT]) in an urbanizing rural population of Bangladesh and associated cardiometabolic risk indicators and depression. Methods A total of 2,293 subjects aged ≥20 years in an urbanizing rural Bangladeshi community were investigated. Socio-demographic and anthropometric details, blood pressure, fasting plasma glucose (FPG), 2 hours after 75 g plasma glucose (2hPG), glycosylated hemoglobin, fasting serum insulin and lipid profiles were studied. Presence of depressive symptoms using Montogomery-Asberg Depression Rating Scale was also assessed. Results The prevalence of IFG, IGT, IFG+IGT, and T2DM were 3.4%, 4.0%, 1.2%, and 7.9%, respectively. The prevalence of T2DM and impaired glucose regulation differed between males and females, but, both increased with age in both sexes. FPG and 2hPG had positive correlation. Employing logistic regression, it was found that increased age, waist to hip ratio, systolic blood pressure, total cholesterol, triglycerides, and depression were independent risk indicators for diabetes. Both insulin resistance and β-cell deficiency were significantly related for causation of diabetes. Among the study population, 26.2% had general obesity, 39.8% central obesity, 15.5% hypertension, 28.7% dyslipidemia, 17.6% family history of diabetes, and 15.3% had depression. Physical inactivity and smoking habits were significantly higher in male. Conclusion Rising prevalence of diabetes and impaired glucose regulation in this urbanizing rural population exist as a significant but hidden public health problem. Depression and other cardiometabolic risk indicators including obesity, hypertension, and dyslipdemia were also prevalent in this population.

Prevalence of Diabetes Mellitus and its Associated Risk Indicators in a Rural Bangladeshi Population

Background: Substantial racial heterogeneity in diabetes leads to the necessity of conducting epidemiological studies in different communities. Such studies are still inadequate in Bangladeshi population, particularly in truly respective rural areas. The objectives of the study were to estimate the prevalence of diabetes and to identify its associated risk indicators in a rural population of Bangladesh. Methods: This population based cross-sectional study was conducted in remote rural areas of Northern Bangladesh, which included a total of 836 participants aged at or above 25 years through screening in camp settings. Diabetes was diagnosed by WHO criteria after a 2-sample OGTT. BMI, waist-hip ratio, blood pressure, lipid profile and serum creatinine were also estimated. Results: The prevalence of diabetes was found to be 7.2% (95% CI 5.4-9.0) and that of impaired glucose regulation (including both impaired glucose tolerance (IGT) and/or impaired fasting glucose (IFG)) was 6.5% (95% CI 4.8-8.2). The prevalence of diabetes and impaired glucose regulation differed between males and females, but, both increased with age in males as well as females. A good correlation was observed between fasting blood glucose and 2hr after glucose (Kappa value 0.86) among the study participants. After adjusting for potential confounders BMI and WHR were found as significant independent risk indicators for the occurrence of diabetes in this population.

Anthropometric indicators of obesity for identifying cardiometabolic risk factors in a rural Bangladeshi population

The aim of the present study was to evaluate the predictive ability of body mass index (BMI), waist circumference (WC), waist‐to‐hip ratio (WHR), waist‐to‐height ratio (WHtR) and body fat percentages (BF%) for the presence of cardiometabolic risk factors, namely type 2 diabetes (DM), hypertension (HTN), dyslipidemia and metabolic syndrome (MS).

Incidence of diabetes in Asian-Indian subjects: a five year follow-up study from Bangladesh.

AIMS To determine the incidence of Type 2 diabetes and its risk factors. Further, to examine the effect of relative changes in obesity (BMI and waist circumference). METHODS A sample of 2011 non-diabetic adults aged 20 and above were randomly selected and followed from 1999 to 2004. Fasting blood glucose including biophysical and anthropometric measures was measured. RESULTS The overall 5 year cumulative incidence of diabetes was 16.4 per 1000 person-years and 65.1 per 1000 person-years in those with impaired fasting glucose adjusted for age and sex. Among obesity measures, only waist >85in. increased the risk for diabetes in males (RR=3.0). Relative changes stratified by loss in BMI and WC ≥5% or gain of BMI >15% from the baseline values for men were significantly associated with the incidental cases of diabetes. Increased hip circumference for men was significantly associated with a protective effect while an opposite association was observed for women. CONCLUSION Relative change in both loss and excessive gain of BMI were risks for increased diabetes. Targeted intervention in those with impaired fasting blood glucose will expectedly reduce the incidental cases. Further investigations are needed for non obese related diabetes in Asian Indian subjects.

Anthropometric indices of obesity and type 2 diabetes in Bangladeshi population: Chandra Rural Diabetes Study (CRDS)

BACKGROUND Obesity is a risk factor for type 2 diabetes (DM); however, no study has specially assessed the anthropometric indices as predictors of diabetes in rural Bangladeshi population. OBJECTIVE To identify markers for diabetes through body mass index (BMI), waist circumference (WC), waist hip ratio (WHR) and waist height ratio (WHtR) and identify the optimal cut-off values suitable for Bangladeshi adult population. METHODS A total of 2293 subjects aged ≥20 years from rural Bangladesh were randomly recruited to participate in a population-based, cross sectional survey. Age adjusted data for anthropometric indices and diabetes risk were assessed and their relationships were examined. RESULTS Age adjusted prevalence of DM in men and women were 9.5% and 7.0%, respectively. Both men and women with DM had a higher rate of general obesity (defined by BMI) and central obesity (defined by WC, WHR and WHtR) than non-diabetic subjects. In both men and women the most sensitive indice was WHR for predicting DM. The appropriate cut-offs values for WHR to predict DM in men and women were 0.93 and 0.87, respectively. WC of 82 cm for both sexes was appropriate to predict DM. Those of BMI and WHtR were 21.2 kg/m2, 21.8 kg/m2 and 0.53, 0.54 in men and women, respectively. CONCLUSIONS Compared with BMI, measures of central obesity, WHR, WC, WHtR showed a better association with the risk of DM for both sexes in rural Bangladeshi population. Follow-up studies are needed for validifying these cut-offs values.

Comparison of the prevalence of metabolic syndrome and its association with diabetes and cardiovascular disease in the rural population of Bangladesh using the modified National Cholesterol Education Program Expert Panel Adult Treatment Panel III and International Diabetes Federation definitions

To compare the prevalence of metabolic syndrome (MS) using the modified National Cholesterol Education Program Adult Treatment Plan III (NCEP) and the International Diabetes Federation (IDF) definitions and, using both definitions, determine and compare the association of MS, prediabetes, type 2 diabetes, hypertension (HTN) and cardiovascular disease risk (CVD).

HbA1c as a diagnostic tool for diabetes and pre‐diabetes: the Bangladesh experience

To evaluate HbA1c as a tool for the diagnosis of diabetes and pre‐diabetes (impaired glucose tolerance and/or impaired fasting glucose) and to identify the optimal cut‐off values suitable for a Bangladeshi population.

Association of general and central obesity with diabetes and prediabetes in rural Bangladeshi population

BACKGROUND AND AIMS Recent data shown that both general and central obesity indices are significantly associated with diabetes (T2DM) and prediabetes (impaired glucose tolerance [IGT] and impaired fasting glucose [IFG]). Data regarding association of obesity with T2DM and prediabetes in rural Bangladeshi population is scarce. This study aims to observe the association of general and central obesity with diabetes (T2DM) and prediabetes in rural Bangladeshi population. MATERIALS AND METHODS A total of 2293 rural Bangladeshi adults aged ≥20 years were randomly selected in a population-based, cross-sectional survey which was conducted in 2009. The association of general (defined by body mass index [BMI]) and central obesity (defined by waist circumference [WC] and waist hip ratio [WHR]) with T2DM and prediabetes was assessed by using receiver operating characteristic curve analysis and logistic regression. RESULTS Subjects with T2DM, IGT and IFG had a higher rate of general and central obesity than normal subjects. WHR was more closely associated with T2DM than WC and BMI. However, all three obesity indices were significantly associated with IGT and IFG. CONCLUSIONS In rural Bangladeshi population, both general and central obesity showed good association with T2DM and prediabetes.

Incidence of diabetic retinopathy in Bangladesh: a 15-year follow-up study.

Background:  The aim of the present study was to estimate the incidence of diabetic retinopathy (DR) among type 2 diabetic (T2D) subjects in Bangladesh.