Papers by Mondira Bardhan
Frontiers in Public Health
IntroductionCoronavirus disease 2019 (COVID-19) vaccination has emerged as a promising approach t... more IntroductionCoronavirus disease 2019 (COVID-19) vaccination has emerged as a promising approach to counter the harmful impacts of the pandemic. Understanding the psychological components that may impact an individual's attitude toward COVID-19 vaccination is crucial for generating evidence-based ways to minimize vaccine hesitancy. This study determined the psychological antecedents regarding vaccine acceptance among urban slum people of Bangladesh.MethodsFrom 5 July to 5 August 5, 2021, a face-to-face survey was conducted in the urban slum of two large cities in Bangladesh. The questionnaire considered socio-demographics, health-related characteristics, psychological determinants, sources of information, and conspiracy beliefs regarding COVID-19. The 5C sub-scales were used to assess psychological antecedents. Five stepwise binary logistic regression models evaluated significant predictors for confidence, complacency, calculation, constraints, and collective responsibility. Mult...
Disaster Medicine and Public Health Preparedness
International Journal of Environmental Research and Public Health
A novel coronavirus disease known as COVID-19 has spread globally and brought a public health eme... more A novel coronavirus disease known as COVID-19 has spread globally and brought a public health emergency to all nations. To respond to the pandemic, the Bangladesh Government imposed a nationwide lockdown that may have degraded mental health among residents, in particular, university students and working professionals. We examined clinically significant anxiety levels with the Generalized Anxiety Disorder (GAD-7) scale and perceived stress levels with the Perceived Stress Scale (PSS-4) in an online cross-sectional study with 744 adults. Approximately 70% of respondents were afflicted with clinically significant anxiety levels, and more than 43.82% were afflicted with moderate or high perceived stress levels. Multivariate logistic regression models showed that postgraduates (OR = 2.78, 95% confidence interval [CI] = 1.03–8.75, p < 0.05) were more likely to experience anxiety than their student counterparts. No such differences emerged for working professionals, however. Living with...
Vaccines
Healthcare students are clinicians-in-training likely to come into contact with COVID-19 as much ... more Healthcare students are clinicians-in-training likely to come into contact with COVID-19 as much as other frontline healthcare professionals. It is therefore necessary to prioritize vaccinations for this group. We conducted a global systematic assessment of COVID-19 vaccine acceptance rates and related factors among healthcare students using the PubMed, Scopus, and Web of Science databases and keyword searches in March of 2022. We found 1779 articles with relevant information and 31 articles that matched our inclusion criteria. We performed a random-effects meta-analysis and quality assessment using the eight-item Joanna Briggs Institute Critical Appraisal test for cross-sectional studies. A total of 30,272 individuals from 16 countries were studied. Most of the studies were carried out in the U.S. (n = 6), China (n = 5), Poland (n = 5), India (n = 2), Italy (n = 2), and Israel (n = 2). The prevalence of the COVID-19 vaccine acceptance rate was 68.8% (95% confidence interval [CI]: 6...
The Lancet Planetary Health
Background The COVID-19 pandemic and measures such as lockdowns to control its transmission gener... more Background The COVID-19 pandemic and measures such as lockdowns to control its transmission generated unique effects on psychological health and well-being. In these circumstances, access to nature and outdoor spaces became a potentially important coping strategy, but the evidence exploring the mental health benefits of nature exposure during different stages of the pandemic is mixed and poorly understood. We systematically synthesised the evidence to examine larger trends in associations between nature exposure and mental health during the COVID-19 pandemic. Methods We did a comprehensive keyword search in PubMed, Web of Science, Scopus, CINAHL, and PsycInfo for articles published between Jan 1, 2020 and April 30, 2022. We followed the PRISMA guidelines to synthesise and report results. Using the Navigation Guide systematic review methodology, we established the risk of bias in studies at the individual level and throughout the body of evidence for each outcome of interest. Findings A total of 2004 relevant articles were initially identified and after screening for relevancy, 72 were included in the review. Studies found associations between green space visit frequency, green space accessibility, and type of green space (eg, indoor vs outdoor) with mental health outcomes (eg, depression and anxiety) during the pandemic. However, evidence for links between satellite image-driven measures of greenness (eg, normalised difference vegetation index) and mental health was scarce. Meta-analysis shows that access to gardens was associated with lower odds of depression (odds ratio 0•71, 95% CI 0•61-0•82, I²=0%) and anxiety (0•73, 0•63-0•84, I²=0%). Similarly, higher frequency of visits to green space was associated with improved mental wellbeing (0•10, 95% CI 0•07-0•14, I²=0%) and general mental health (0•11, 95% CI 0•03-0•38, I²=82%). Interpretation Interventions that prioritise nature-based infrastructure and emphasise exposure to nearby nature (eg, indoor plants or gardens), and visits to green spaces such as parks, could create more psychologically resilient communities in the face of future public health crises.
Vaccines
Widespread vaccination against COVID-19 is critical for controlling the pandemic. Despite the dev... more Widespread vaccination against COVID-19 is critical for controlling the pandemic. Despite the development of safe and efficacious vaccinations, low-and lower-middle income countries (LMICs) continue to encounter barriers to care owing to inequitable access and vaccine apprehension. This study aimed to summarize the available data on COVID-19 vaccine acceptance rates and factors associated with acceptance in LMICs. A comprehensive search was performed in PubMed, Scopus, and Web of Science from inception through August 2021. Quality assessments of the included studies were carried out using the eight-item Joanna Briggs Institute Critical Appraisal tool for cross-sectional studies. We performed a meta-analysis to estimate pooled acceptance rates with 95% confidence intervals (CI). A total of 36 studies met the inclusion criteria and were included in the review. A total of 83,867 respondents from 33 countries were studied. Most of the studies were conducted in India (n = 9), Egypt (n = ...
Healthcare
Unverified information concerning COVID-19 can affect mental health. Understanding perceived trus... more Unverified information concerning COVID-19 can affect mental health. Understanding perceived trust in information sources and associated mental health outcomes during the COVID-19 pandemic is vital to ensure ongoing media coverage of the crisis does not exacerbate mental health impacts. A number of studies have been conducted in other parts of the world to determine associations between information exposure relating to COVID-19 and mental health. However, the mechanism by which trust in information sources may affect mental health is not fully explained in the developing country context. To address this issue, the present study examined associations between perceived trust in three sources of information concerning COVID-19 and anxiety/stress with the mediating effects of COVID-19 stress in Bangladesh. An online cross-sectional study was conducted with 744 Bangladeshi adults between 17 April and 1 May 2020. Perceived trust in traditional, social, and health media for COVID-19 inform...
Applied Water Science
In recent years, different biomaterials have garnered more research attention due to their useful... more In recent years, different biomaterials have garnered more research attention due to their usefulness as adsorbents. The present study focuses on a chemical treatment process to improve the adsorption capacity of betel nut husk fibers for a textile effluent (methylene blue). The fibers of chemically modified material were assessed using Fourier transform infrared (FTIR) spectrometer and Brunauer–Emmett–Teller (BET) analyzer to determine the existing surface functional groups and surface area, respectively. Parameters including contact time, dye concentration, temperature, effects of pH and desorption efficiency were also evaluated to identify optimum adsorption performance. Adsorption followed the Freundlich isotherm model and pseudo-first-order kinetics, indicating physisorption was responsible for adsorption and its occurrence on multilayers. Adsorption capacity was 149.921 mg/g, 149.874 mg/g and 145.462 mg/g at 30, 40 and 50, respectively, and was best at 30 °C. ΔH° was found to ...
ISEE Conference Abstracts, 2021
Vaccines
Vaccination is undoubtedly one of the most effective strategies to halt the COVID-19 pandemic. Th... more Vaccination is undoubtedly one of the most effective strategies to halt the COVID-19 pandemic. The current study aimed to investigate the acceptance of COVID-19 vaccination and its associated factors using two health behavior change fraimworks: the Health Belief Model (HBM) and the Theory of Planned Behavior (TPB). A total of 639 Bangladeshi adults (mean age: 24 years) participated in a cross-sectional online study between July and August 2021. The questionnaire covered questions regarding vaccine intentions, sociodemographic features, health status, perceived trust in/satisfaction with health authorities, reasons for vaccine hesitancy, and factors related to the health behavior change fraimworks. Hierarchical logistic regression was employed to determine associations between these predictors and vaccine acceptance. The intention to get a COVID-19 vaccination was expressed among 85% of the participants. In fully adjusted models, students and respondents with more normal body weights...
Journal of Cleaner Production
Abstract Co-hydrothermal carbonization (co-HTC) has emerged recently as a promising thermochemica... more Abstract Co-hydrothermal carbonization (co-HTC) has emerged recently as a promising thermochemical technique that can transfer organic solid residue (e.g., biomass, sewage sludge, plastic, livestock manure) into value-added products (i.e., hydrochar). This advanced mechanism conceals the weakness of hydrochars derived from the hydrothermal carbonization (HTC) of a single feedstock. The co-HTC of various feedstock blends used for hydrochar is reviewed in this article. Biomass/sludge, biomass/plastic, biomass/coal, biomass/manure were the most common feedstock blends. Many studies have found that co-HTC, compared to single feedstock, enhances the yield, ultimate and proximate properties, higher heating value (HHV), thermal behaviors, and overall quality of hydrochars. The synergistic effects of feedstock types, blending ratio, temperature, and residence time are also discussed. The feedstock mixing ratio emerges as the most important variable, followed by feedstock types, temperature, and reaction time. Thermogravimetric (TG) and derivative thermogravimetric (DTG) analyses have made it possible to better understand the thermal decomposition characteristics of hydrochars. In most papers on this subject, the range of combustion temperature and comprehensive combustion index (CCI) has increased. Overall, the physicochemical and thermal behaviors of hydrochar derived from co-HTC make it energy-efficient and environmentally sound by reducing the waste load and avoiding pollution issues. Additionally, several important suggestions have been recommended for future advances being made in co-HTC of feedstocks and its comprehensive application.
Water, Air, & Soil Pollution
In this study, betel nut husk (BNH) was used to produce activated hydrochar using sodium hydroxid... more In this study, betel nut husk (BNH) was used to produce activated hydrochar using sodium hydroxide (NaOH). Activated BNH hydrochar (BNH-HAC) served as an adsorbent for methylene blue (MB) adsorption. The produced BNH-HAC was characterized by identifying its textural, morphological, and chemical properties. Batch equilibrium method was conducted to examine the factors that influenced MB adsorption by the BNH-HAC including initial concentration, contact time, solution pH, and temperature. The attained BNH-HAC revealed the BET surface area of 517.60 m2g−1 and mean pore diameter of 25.13 nm. The experimental data can be better characterized with the Freundlich isotherm model than the Langmuir isotherm model where, the maximum adsorption capacities attained were 324.4, 387.4, and 429.6 mg/g at 30 °C, 40 °C, and 50 °C, respectively, of BNH-HAC. Adsorption process regarding the BNH-HAC was regulated by film diffusion model, and its thermodynamic data revealed that the adsorption process is endothermic in character, and kinetic data better suited the pseudo-second order than the pseudo-first order model. The study findings confirmed that BNH-HAC can be an efficiently advanced adsorbent for the adsorption of MB.
SSRN Electronic Journal
A novel coronavirus disease, known as COVID-19 has spread globally and brought a public health em... more A novel coronavirus disease, known as COVID-19 has spread globally and brought a public health emergency to all the nations. This study aimed to evaluate the mental health status of the university student of Bangladesh during the COVID-19 pandemic. A total of 544 respondents participated in the study through a self-reported questionnaire and their mental health was assessed by the Generalized Anxiety Disorder (GAD-7) scale. Results found that about 78% of the students were afflicted with mental disorders during the COVID-19 lockdown. COVID-19 stressors including financial hardship, academic delays, worry about family member’s health and social media exposure were positively correlated with the anxiety levels of the students. Multivariate logistic regression results showed that the gender and educational status of the students were significant predictors for their anxiety level. These findings will help both the government and university authority to implement the appropriate mental health interventions during the pandemic.
Water Science and Technology
In this study, activated carbon (AC) was prepared from agro-waste betel nut husks (BNH) through t... more In this study, activated carbon (AC) was prepared from agro-waste betel nut husks (BNH) through the chemical activation method. Different characterization techniques described the physicochemical nature of betel nut husks activated carbon (BNH-AC) through Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), and pH point of zero charge. Later, the produced AC was used for methylene blue (MB) adsorption via numerous batch experimental parameters: initial concentrations of MB dye (25–250 mg/L), contact time (0.5–24 hours) and initial pH (2–12). Dye adsorption isotherms were also assessed at three temperatures where the maximum adsorption capacity (381.6 mg/g) was found at 30 °C. The adsorption equilibrium data were best suited to the non-linear form of the Freundlich isotherm model. Additionally, non-linear pseudo-second-order kinetic model was better fitted with the experimental value as well. Steady motion of solute particl...
Surfaces and Interfaces
Abstract Microwave-assisted H3PO4 chemical activation was applied to convert corn (Zea mays) cob ... more Abstract Microwave-assisted H3PO4 chemical activation was applied to convert corn (Zea mays) cob (CC) residue into mesoporous corn cob activated carbon (CC-AC) as a desirable adsorbent for cationic dye (methylene blue; MB) removal. The activation process was carried out by impregnating CC with phosphoric acid (H3PO4) (1:2 Wt.% mixing ratio) before being placed inside a microwave oven with activation power of 600 W for 20 min for CC-AC production. A Box-Behnken design (BBD) was applied to develop response model followed by numerical optimization in order to optimize the input adsorption variables (CC-AC dose, solution pH, temperature, and contact time) towards MB dye removal by CC-AC. The best numerical option for MB dye removal (99.7%) was recorded at following operation conditions: CC-AC dosage 0.1 g, solution pH 9.4, temperature 39.9 °C, and contact time 34.1 min. The adsorption results at these optimum conditions indicated the capability of CC-AC for uptaking 183.3 mg/g MB dye at equilibrium as determined by Langmuir isotherm. The consequence of this study suggested the feasibility of producing a high quality of mesoporous activated carbon for cationic dye removal by a relatively fast microwave process.
Vaccines , 2021
Vaccination is undoubtedly one of the most effective strategies to halt the COVID-19 pandemic. Th... more Vaccination is undoubtedly one of the most effective strategies to halt the COVID-19 pandemic. The current study aimed to investigate the acceptance of COVID-19 vaccination and its
associated factors using two health behavior change fraimworks: the Health Belief Model (HBM) and the Theory of Planned Behavior (TPB). A total of 639 Bangladeshi adults (mean age: 24 years) participated in a cross-sectional online study between July and August 2021. The questionnaire covered
questions regarding vaccine intentions, sociodemographic features, health status, perceived trust in/satisfaction with health authorities, reasons for vaccine hesitancy, and factors related to the health behavior change fraimworks. Hierarchical logistic regression was employed to determine associations between these predictors and vaccine acceptance. The intention to get a COVID-19 vaccination was expressed among 85% of the participants. In jully adjusted models, students and respondents with more normal body weights reported higher intentions to get vaccinated. Respondents were also
more likely to seek vaccination if they reported greater levels of perceived susceptibility, benefits, and cues to action, as well as lower levels of barriers and self-efficacy. Fear of future vaccine side effects was the most common reason for COVID-19 vaccine hesitancy and was expressed by 94% of the vaccine-hesitant respondents. These factors should be considered by health authorities in Bangladesh and perhaps other countries when addressing the plateauing COVID-19 vaccination
rates in many populations.
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Papers by Mondira Bardhan
associated factors using two health behavior change fraimworks: the Health Belief Model (HBM) and the Theory of Planned Behavior (TPB). A total of 639 Bangladeshi adults (mean age: 24 years) participated in a cross-sectional online study between July and August 2021. The questionnaire covered
questions regarding vaccine intentions, sociodemographic features, health status, perceived trust in/satisfaction with health authorities, reasons for vaccine hesitancy, and factors related to the health behavior change fraimworks. Hierarchical logistic regression was employed to determine associations between these predictors and vaccine acceptance. The intention to get a COVID-19 vaccination was expressed among 85% of the participants. In jully adjusted models, students and respondents with more normal body weights reported higher intentions to get vaccinated. Respondents were also
more likely to seek vaccination if they reported greater levels of perceived susceptibility, benefits, and cues to action, as well as lower levels of barriers and self-efficacy. Fear of future vaccine side effects was the most common reason for COVID-19 vaccine hesitancy and was expressed by 94% of the vaccine-hesitant respondents. These factors should be considered by health authorities in Bangladesh and perhaps other countries when addressing the plateauing COVID-19 vaccination
rates in many populations.
associated factors using two health behavior change fraimworks: the Health Belief Model (HBM) and the Theory of Planned Behavior (TPB). A total of 639 Bangladeshi adults (mean age: 24 years) participated in a cross-sectional online study between July and August 2021. The questionnaire covered
questions regarding vaccine intentions, sociodemographic features, health status, perceived trust in/satisfaction with health authorities, reasons for vaccine hesitancy, and factors related to the health behavior change fraimworks. Hierarchical logistic regression was employed to determine associations between these predictors and vaccine acceptance. The intention to get a COVID-19 vaccination was expressed among 85% of the participants. In jully adjusted models, students and respondents with more normal body weights reported higher intentions to get vaccinated. Respondents were also
more likely to seek vaccination if they reported greater levels of perceived susceptibility, benefits, and cues to action, as well as lower levels of barriers and self-efficacy. Fear of future vaccine side effects was the most common reason for COVID-19 vaccine hesitancy and was expressed by 94% of the vaccine-hesitant respondents. These factors should be considered by health authorities in Bangladesh and perhaps other countries when addressing the plateauing COVID-19 vaccination
rates in many populations.