Associations between urinary heavy metal concentrations and blood pressure in residents of Asian countries

BACKGROUND@#Previous studies have suggested that exposures to heavy metals (arsenic, cadmium, lead, and selenium) may be associated with differences in blood pressure. However, the findings of these studies have been inconsistent. This study was performed to examine the associations between urinary heavy metal concentrations and blood pressure among residents of four Asian countries (Bangladesh, Indonesia, Nepal, and Vietnam).@*METHODS@#This cross-sectional study examined 1899 adults in four Asian countries. Urinary concentrations of heavy metals were measured by inductively coupled plasma mass spectrometry. A questionnaire survey was administered regarding individual characteristics. Anthropometric measurements (height and weight) were performed. Systolic and diastolic blood pressures were measured after a short rest. Multiple linear regression models were applied to investigate associations between urinary heavy metal concentrations and blood pressure after adjustments for age, sex, and body mass index.@*RESULTS@#The geometric means of the urinary concentrations of arsenic, cadmium, lead, and selenium were 84.6, 0.885, 2.09, and 16.5 μg/g creatinine, respectively. The urinary arsenic concentrations were slightly higher than those typically reported in non-polluted populations, while urinary cadmium, lead, and selenium concentrations were equivalent or slightly lower. The urinary lead concentrations were positively associated with both systolic and diastolic blood pressure, but urinary selenium concentrations were negatively associated with them.@*CONCLUSIONS@#Variations in the urinary concentrations of lead and selenium were associated with blood pressure at low levels of exposure/intake.

Gestational Diabetes Among The Arsenic Exposed Women From Arsenic Contaminated Area Of Bangladesh

@#Exposure to groundwater arsenic contamination has been demonstrated to be associated with an increased risk of diabetes mellitus in Bangladesh. But, the association between arsenic exposure and Gestational Diabetes Mellitus (GDM) in Bangladesh remains to be reported. This cross-sectional study was carried out to assess the occurrence of GDM amongst pregnant women from the arsenic contaminated area. A total of 200 pregnant women who were aged 20 years and more, having gestational age more than 21 weeks, and had attended a district hospital for antenatal checkup were selected for the study. Of the total 200 participants, 15.5% were found to have GDM and it was significantly high (p=0.029) in women with higher gestational age. Regarding arsenic exposure, 39.5% of the participants were categorized as arsenic exposed and amongst them the proportion of GDM was found high (20.3%). Binary logistic regression analysis showed that the increase in gestational age and BMI, and a higher level of arsenic in urine of the total participants, had significantly (p<0.05) ability to predict the likelihood of having GDM (1.2, 1.1 and 9.2 times respectively). While logistic regression analysis among the arsenic exposed participants showed that higher level of BMI was 1.2 times and arsenic in urine was 9.4 times likely to predict the likelihood of having GDM. Thus, it was revealed that the increased concentration of arsenic in urine had the strongest ability to predict the likelihood of developing GDM among the pregnant women. The study concluded that the arsenic exposed pregnant women suffered more from GDM compared to the non-exposed pregnant woman.

Food Habits Among The Arsenic Exposed Population In The Rural Areas Of Nepal And Bangladesh

Arsenicosis, the illness due to chronic arsenic toxicity is prevalent in both Nepal and Bangladesh. The occurrence of arsenicosis depends upon many factors including food and nutrition. The objective of this study was to find out any difference of food habits among the arsenic exposed households of both countries and the relationship with the occurrence of arsenicosis. This was a cross-sectional comparative study, conducted among the arsenic exposed rural households of Nawalparasi district in Nepal and Faridpur district in Bangladesh. A total of 190 and 200 female rural households from Nepal and Bangladesh were selected respectively as the respondents. The majority of the respondents of both countries were under the age of 40 years. The prevalence of arsenicosis was found significantly low (χ2 = 8.847; p=.002) among the Nepalese households (7.3%) than that of Bangladeshi households (11.0%). As a staple food, rice, vegetables and pulses were more common among the Nepalese households in comparison to that of Bangladesh (χ2=5.739; p=.017). In addition to staple food Nepalese households were found to take significantly more (p<.05) bread (74.7%), egg (73.2%), milk (68.9%) and fruits (58.4%). In contrast, Bangladeshi households took a little more meat (59.0%) and fish (73.5%). To get arsenic-safe water, 39.5% Bangladeshi households used a filter while a few Nepalese households (2.6%) used that. Nepalese households were found to take more protein and vitamins rich foods as staple food compared to that of Bangladeshi households, which might play a role in the low occurrence of arsenicosis amongst them.

Food Habits Among The Arsenic Exposed Population In The Rural Areas Of Nepal And Bangladesh

@#Arsenicosis, the illness due to chronic arsenic toxicity is prevalent in both Nepal and Bangladesh. The occurrence of arsenicosis depends upon many factors including food and nutrition. The objective of this study was to find out any difference of food habits among the arsenic exposed households of both countries and the relationship with the occurrence of arsenicosis. This was a cross-sectional comparative study, conducted among the arsenic exposed rural households of Nawalparasi district in Nepal and Faridpur district in Bangladesh. A total of 190 and 200 female rural households from Nepal and Bangladesh were selected respectively as the respondents. The majority of the respondents of both countries were under the age of 40 years. The prevalence of arsenicosis was found significantly low (χ2 = 8.847; p=.002) among the Nepalese households (7.3%) than that of Bangladeshi households (11.0%). As a staple food, rice, vegetables and pulses were more common among the Nepalese households in comparison to that of Bangladesh (χ2=5.739; p=.017). In addition to staple food Nepalese households were found to take significantly more (p<.05) bread (74.7%), egg (73.2%), milk (68.9%) and fruits (58.4%). In contrast, Bangladeshi households took a little more meat (59.0%) and fish (73.5%). To get arsenic-safe water, 39.5% Bangladeshi households used a filter while a few Nepalese households (2.6%) used that. Nepalese households were found to take more protein and vitamins rich foods as staple food compared to that of Bangladeshi households, which might play a role in the low occurrence of arsenicosis amongst them.

Prevalence and Determinants of Smoking Behaviour among the Secondary School Teachers in Bangladesh

Despite country’s tobacco control law, cigarette smoking by the young people and the magnitude of nicotine dependence among the school personnel is alarming. To determine the prevalence of smoking and to examine the determinants of smoking behaviour among the secondary school teachers in Bangladesh. A two-stage cluster sampling was used with a selection of schools on Probability Proportional to Enrolment (PPE) size followed by stratified random sampling of government and private schools and then all the teachers present on the day of the survey were selected for the study. The 66-item questionnaire included smoking behaviour, knowledge, attitude, second-hand smoking, tobacco free school policy, cessation, media advertisement and curriculum related topics. Seven additional questions were included to assess the socio-demographic characteristics of the teachers. Data analysis was performed using SPSS 17 software. A total of 60 schools were selected with school response rate of 98.3%. An anonymous self-administered questionnaire was filled in by all teachers present at the day of the survey. The sample consisted of 559 teachers with response rate of 99.5%. The prevalence of smoking was 17% (95% CI: 14%, 20.4). About half of the teachers (48.4%) smoke daily followed by 25.3% smoke 1-2 days in last 30 days. The mean duration smoking of was 13.7(95% CI: 11.6, 15.9) years. Logistic regression analysis revealed that male teachers smoke 37.46(95% CI: 5.078, 276.432) times higher than their female counterparts. The graduate teachers were 2.179(95% 1.209, 3.926) times more likely to be smoke than master’s degree holder teachers. Smoking by friends appeared to be the strongest predictor for teachers smoking behaviour (OR 4.789, 95% CI: 1.757, 13.050). However, no statistically significant association was found between type of school, second-hand smoking and curriculum related factors and smoking behaviour of the teachers (p>0.05). Prevalence of smoking among the teachers is high in Bangladesh. Effective smoking prevention program should take into account within the dominant of socio-environmental influence to reduce smoking behaviour. The school curriculum items had less impact in preventing smoking behaviour.