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Trends and inequity in improved sanitation facility utilisation in Bangladesh: Evidence from Bangladesh Demographic and Health Surveys


Improved sanitation is indispensable to human health. However, lack of access to improved sanitation remains one of the most daunting public health challenges of the twenty-first century in Bangladesh. The aim of the study was to describe the trends in access to improved sanitation facilities following the inequity gap among households in different socioeconomic groups in Bangladesh. Data from the Bangladesh Demographic and Health Survey (BDHS) 2007, 2011, 2014, and 2017-18 were extracted for this study. Inequity in access to improved sanitation was calculated using rich-poor ratio and concentration index to determine the changes in inequity across the time period. In Bangladesh, the proportion of households with access to improved sanitation increased steadily from 25.4% to 45.4% between 2007 and 2014, but slightly decreased to 44.0% in 2017-18. Age, educational status, marital status of household head, household wealth index, household size, place of residence, division, and survey year were significantly associated with the utilisation of improved sanitation. There is a pro-rich situation, which means that utilisation of improved sanitation was more concentrated among the rich across all survey years (Concentration Index ranges: 0.40 to 0.27). The government and other relevant stakeholders should take initiatives considering inequity among different socioeconomic groups to ensure the use of improved sanitation facilities for all, hence achieving universal health coverage.

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Access to improved sanitation is a basic human right for every person [1, 2]. As defined by the WHO/UNICEF Joint Monitoring Programme  (JMP) on Water Supply, Sanitation, and Hygiene (WASH), ‘improved’ sanitation facilities are not shared with other households and are designed to hygienically separate excreta from human contact [3]. However, nearly one-third of the global population, over 3.6 billion people, still do not have access to this fundamental need [3, 4].

Unimproved sanitation perpetuates a high risk of disease transmission, including cholera, typhoid, schistosomiasis, respiratory infections, skin infections, eye infections, and even certain cancers due to exposure to carcinogens [5]. Moreover, it also increases the burden of malnutrition [6]. Therefore, poor sanitation significantly contributes to a high transmission of neglected tropical diseases in low-and middle-income countries (LMICs) and around 432,000 deaths annually [7].

Improved sanitation is considered one of the most significant public health needs which requires much attention in LMICs. Currently, around 27.0% of the population in LMICs has access to improved sanitation [8]. Rural communities within LMICs make up the majority of the population who do not have access to basic sanitation and approximately 90.0% practice open defecation [8]. In Bangladesh, less than half of the population (47.0%) has access to basic sanitation in 2015 [3]. Between 2006 and 2009, there was an almost two-fold increase in the availability of improved sanitation facilities, with both rural and urban regions exhibiting remarkable growth [9]. Despite a variety of updated sanitation interventions, the coverage of improved sanitation could not reach the optimal level across all socioeconomic groups in Bangladesh [10].

Studying the determinants associated with the utilisation of improved sanitation is one of the ways of understanding these inequities among people with different socioeconomic status. Evidence suggests that wealth index, gender, age and education of household head, and household size are associated with the utilisation of improved sanitation in LMICs [11, 12]. A limited number of studies have been conducted on improved sanitation facilities in Bangladesh [9, 10, 13, 14]. Moreover, a few studies have covered the comprehensive picture of improved sanitation utilisation after the country-wide interventions [15, 16]. Therefore, the objective of this study is to investigate the trend of utilisation of improved sanitation, its associated factors and persisting inequities in service utilisation in Bangladesh.


Data source

Data were extracted from four rounds of Bangladesh Demographic and Health Surveys (BDHS) during 2007, 2011, 2014, and 2017-18. These nationally representative surveys covered information on socio-demographic and -economic characteristics, family planning, utilisation of maternal and child health services, and access to water and sanitation [17,18,19,20].

Study population

These cross-sectional surveys followed a two-stage stratified random sampling of households [17,18,19,20]. The BDHSs of 2007, 2011, 2014, and 2017-18 collected information from 10,400, 17,141, 17,300, and 19,457 households, respectively (Supplementary Fig. 1). Rangpur division, formed in 2010 as Bangladesh’s 7th division, was basically a part of Rajshahi division and Mymensingh, the 8th administrative division of Bangladesh, was composting the northern part of Dhaka division before 2015 [21]. Therefore, data from Rangpur was included in Rajshahi division in 2007 and similarly, Mymensingh data was included in Dhaka division in 2007, 2011, and 2014. To keep homogeneity, we combined Rangpur division and Rajshahi division as ‘Rajshahi division’ for BDHS 2011, 2014, 2017-18 and Mymensingh division and Dhaka division as ‘Dhaka division’ for BDHS 2017-18.

Variable description

In this study, we have defined improved sanitation (basic) according to JMP by WHO and UNICEF as follows: an improved sanitation facility is “one that hygienically separates human excreta from human contact” and that is not shared with other households [3]. Improved sanitation facilities include: flush or pour-flush to piped sewer system, septic tank or pit latrine; ventilated improved pit latrine; pit latrine with slab and composting toilet. However, sanitation facilities are not considered improved when shared with other households, or open to public use. While, unimproved sanitation facilities include: flush or pour-flush to elsewhere; pit latrine without slab or open pit; bucket, hanging toilet or hanging latrine, bush or field (open defecation) [3]. In our data, we had two variables which represents toilet facility and shared status of toilet. Following the definition, we recoded these two variables as “1” for improved toilet facility and “0” for not improved toilet facility and shared status as “1” for not shared and “0” for shared toilet. Finally, we created a new variable with two categories, “1” indicating improved sanitation (both improved toilet facility and not shared toilet) and “0” indicating not improved sanitation (either not improved toilet facility or shared toilet). We have used this variable as our dependent variable.

Statistical analysis

Descriptive analysis and logistic regression

The statistical analysis was conducted using STATA 16.0 (Stata, College Station, TX, USA). Sampling weight was adjusted while performing the analysis. Initially, descriptive analyses were performed to describe the trends in access to improved sanitation facilities over time. Proportion and chi-square tests were done according to socio-demographic and -economic characteristics of the households. We performed binary logistic regression modelling with 95% confidence intervals and tests of statistical significance using pooled data of the four consecutive surveys to determine the factors associated with improved sanitation access. The covariates controlled in the adjusted model are the division, place of residence, wealth index, age, marital status, education level of the household head, and survey years. Adjusted odds ratio (AOR) with 95% confidence intervals (CIs) was presented and p-value < 0.05 was considered statistically significant during the regression analysis. The concentration indices for inequity measurement was calculated for utilisation of improved sanitation and the household’s wealth score. These two estimates were then plotted to generate concentration curves and observe any changes in inequity over the time period.

The operational definition of concentration curves and index

The concentration index is a useful tool proposed by the World Health Organization for assessing the degree of equity of health-related indicators in different economic and social contexts [22]. The concentration curve delineates inequity by plotting the cumulative percentage of improved sanitation utilisation with respect to the cumulative percentage of the household’s wealth score. When the concentration curve conforms to the line of equity at 45°, it indicates perfect equity. A curve that lies above the perfect equity line means the improved sanitation utilisation is concentrated among the poor, and vice versa. The concentration index gives the magnitude of inequity, ranging from − 1 to + 1, and is also defined as twice the area between the concentration curve and the line of equity. Perfect equity is achieved when the index value is zero; the index value closer to -1 means disproportionate improved sanitation utilisation among poor households, while the concentration of improved sanitation utilisation increases among the rich if the index value is closer to +1 [23]. Wagstaff developed a modified concentration index by re-scaling the standard index to keep unscathed the relative inequity variance property of the concentration index [22]. For the corrected concentration index for this study, “conindex” command of STATA has been used [24].


Table 1 shows that improved sanitation utilisation increased from 25.4 to 44.0% from 2007 to 2017-18. Table 1 also demonstrates the distribution of using improved sanitation facilities among households by socio-demographic and -economic backgrounds across the time periods.

Table 1 Percentage distribution of household sanitation facility by background characteristics of households

The covariates, including age, educational status, and marital status of household head, wealth index, household size, division, place of residence, and survey years were significantly associated with utilisation of improved sanitation (Table 2). Households with a head aged ≥ 50 years were 2.7 times more likely to practice improved sanitation than those < 30 years (AOR = 2.73, 95% CI = 2.56–2.93). The household heads with higher education had 3.0 (AOR = 2.96, 95% CI = 2.76–3.17) times higher likelihood of using improved sanitation compared to non-educated household heads. Ever married household heads were 49% more likely to have access of improved sanitation than individuals who were not married. The richest households were 5.0 times (AOR = 5.04, 95% CI = 4.30–5.91) more likely to have access of improved sanitation as compared to lower socioeconomic status households. Compared to the capital Dhaka division, households situated in the Barishal division were 2.2 times (AOR = 2.20, 95% CI = 2.03–2.38) more likely to have access to improved sanitation. Rural households were 37% less likely (AOR = 0.63, 95% CI = 0.53–0.73) to use improved sanitation compared to urban households.

Table 2 Crude odds ratios (COR) and adjusted odds ratios (AOR) of households using improved sanitation and their 95% confidence interval, Bangladesh (N = 64,298)

The rich-poor ratio for utilisation of improved sanitation reduced from 8.4:1 to 4.3:1 between 2007 and 2017-18 (Table 1) and the concentration index also declined from 0.40 to 0.27 (p < 0.001) (Supplementary Table 1). Figure 1 shows the concentration curves of utilisation of improved sanitation from 2007 to 2017-18. The situation was pro-rich, indicating the use of improved sanitation was more concentrated among the rich in the years 2007, 2011, 2014, and 2017-18.

Fig. 1
figure 1

Equity distribution of improved sanitation utilisation over the time from 2007 to 2017-18


This study has revealed that the utilisation of improved sanitation is considerably increasing. Though the rich-poor gap reduced over the time, the inequity is still prevalent between poor and rich communities in accessing improved sanitation. Improved sanitation was better utilised by the households, emphasised by several socio-demographic and -economic factors such as age, educational status, and marital status of household head, wealth index, household size, division, place of residence, and over the time periods.

This study shows that Bangladesh has made consistent positive progress in improving sanitation facilities from 2007 (25.4%) to 2014 (45.4%) [17,18,19,20, 25], similar to studies conducted in other developing countries [11, 12, 25,26,27]. However, this study also found that improved sanitation facility utilisation decreased in 2017-18 (44.0%) compared to 2014 (45.4%). In this unexpected downturn of improved sanitation utilisation, the risk of waterborne diseases such as cholera, diarrhoea, and dysentery, as well as sexual and reproductive health conditions could be increased [28,29,30,31].

Our findings show that wealthy households were more likely to use improved sanitation facilities compared to poorer households, and these results are similar to the previous studies [11, 28, 32]. The plausible explanation is that wealthier people have more ability to pay for improved sanitation [33,34,35].

The Government of Bangladesh has undertaken multiple programmes to promote improved sanitation at all socioeconomic levels of households since 2006. This study found inequity is still existing in 2017-18. Although the rich-poor gap declined consistently from 2007 to 2014 (8.3:1 to 3.8:1), it started to increase (4.3:1) again by 2017-18. Therefore, to achieve universal health coverage by 2030, it is imperative to ensure equitable sanitation facilities for all. A range of studies highlighted that unless governments and relevant stakeholders adopt strategies deliberately targeting all socioeconomic population groups, it would be challenging to achieve universal coverage [36,37,38].

Households with household heads who had achieved higher education were more likely to have access to improved sanitation than their counterparts. This finding is consistent with other similar studies [39,40,41,42]. The finding can be attributed to educated household heads having more knowledge of the health risks associated with poor sanitation systems [43]. Residential differences (living in rural or urban areas) in access to improved sanitation have been observed in this study. Result shows that people from rural areas had lower odds (AOR = 0.63, 95% CI: 0.53–0.73) of using improved sanitation. This was expected, as prior studies found a similar result [5, 28, 32]. Flooding occurs on an annual basis in approximately one-third of Bangladesh, while other areas of the country experience seasonal water shortages [14]. The capacity of rural Bangladeshis to construct and maintain latrines are impacted by each of these factors to varying degrees [14]. To improve this scenario, improved sanitation programmes were likely focused on rural areas [14], reflected in the proportion of utilisation among the rural residents considerably increasing by 2017-18 as compared to urban residents.

The age of the household head was positively correlated with improved sanitation utilisation. The possible explanation could be that older household heads have more knowledge regarding the importance of improved sanitation [12]. Our findings also show significant divisional variation in this study. Compared to the Dhaka division, all other divisions have a higher probability of using improved sanitation. This can be attributed to the high number of people living in slum areas of Dhaka division with inadequate sanitation [44,45,46].

Strengths and limitations

This study has several strengths. Firstly, using large nationally representative surveys’ data that were conducted at different periods. Secondly, the response rate of the participants was excellent. The limitation of this study was that the data in the BDHS was acquired using cross-sectional methods, which restricted the potential for drawing causal inferences.

Conclusion and recommendation

Bangladesh has made significant progress in accessing improved sanitation facilities over the years, but the disparity the between rich and poor remains a matter of concern. Since the proportion of the households using improved sanitation facilities remained low in this study, greater progress is needed for the poorest households. Further research should focus on the community demands to improve sanitation facilities and overcome barriers to achieve progress. Despite this, the existing wealth inequity in accessing the improved sanitation could be reduced by adopting integrated intervention approaches involving both the community and the local government authorities. These findings also suggest that governmental and non-governmental organisations should take initiatives on WASH, considering multifaceted policy strategies that account for regional and residence differences, as well as other defined factors, to achieve universal health coverage in Bangladesh. Moreover, in-depth qualitative research is required to better articulate the recent decline in utilisation of the improved sanitation services in Bangladesh.

Data availability

All data are publicly available upon registration in DHS program supported by USAID at Specifically, the minimal data used for this study are available from the corresponding author on reasonable request.



Adjusted odds ratio


Bangladesh Demographic and Health Survey


Confidence intervals


International Centre for Diarrhoeal Disease Research, Bangladesh


Joint Monitoring Programme


Low-and middle-income countries


Odds ratio


United Nations Children’s Fund


World Health Organization


  1. World Health Organization. United Nations Children’s Fund. Core questions on drinking water and sanitation for household surveys. World Health Organization & United Nations Children’s Fund (UNICEF); 2006.

  2. Chenoweth J, Malcolm R, Pedley S, Kaime T. Household water security and the human right to water and sanitation. Water security: Routledge; 2013. pp. 307–17.

    Google Scholar 

  3. World Health Organization. Progress on Drinking Water, Sanitation and Hygiene. 2017. Update and SDG Baselines. World Health Organization. WHO/UNICEF JMP. UNICEF; 2017.

  4. World Health Organization. Progress on household drinking water, sanitation and hygiene 2000–2020: five years into the SDGs. 2021.

  5. Hanh TTT, Long TK, Minh HV, Huong LTT. Longitudinal household trends in access to improved water sources and sanitation in Chi Linh Town, Hai Duong Province, Viet Nam and associated factors. 2016.

  6. Shahid M, Cao Y, Shahzad M, Saheed R, Rauf U, Qureshi MG, et al. Socio-Economic and Environmental determinants of Malnutrition in under three children: evidence from PDHS-2018. Children. 2022;9(3):361.

    Article  PubMed  PubMed Central  Google Scholar 

  7. Sanitation. World Health Organization; 2022.

  8. Cole J. Sanitation in the Context of Planetary Health: Opportunities and Challenges. Rockefeller Foundation Economic Council on Planetary Health. Oxford Martin? 2018.

  9. Zheng Y, Hakim S, Nahar Q, van Agthoven A, Flanagan SV. Sanitation coverage in Bangladesh since the millennium: consistency matters. J Water Sanitation Hygiene Dev. 2013;3(2):240–51.

    Article  Google Scholar 

  10. Hanchett S. Sanitation in Bangladesh: revolution, evolution, and new challenges. 2016.

  11. Dongzagla A. Socioeconomic and demographic factors affecting urban household access to improved water and sanitation in Ghana. GeoJournal. 2021:1–11.

  12. Armah FA, Ekumah B, Yawson DO, Odoi JO, Afitiri A-R, Nyieku FE. Access to improved water and sanitation in sub-saharan Africa in a quarter century. Heliyon. 2018;4(11):e00931.

    Article  PubMed  PubMed Central  Google Scholar 

  13. Ahmed MS, Islam MI, Das MC, Khan A, Yunus FM. Mapping and situation analysis of basic WASH facilities at households in Bangladesh: evidence from a nationally representative survey. PLoS ONE. 2021;16(11):e0259635.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  14. Hanchett S, Krieger L, Kahn MH, Kullmann C, Ahmed R. Long-term sustainability of improved sanitation in rural Bangladesh. 2011.

  15. Akter J, Islam MR, Akter S, Rahman MM, Hossain F, Anam MR, et al. Equity in access to safely managed sanitation and prevalence of Diarrheal Diseases in Bangladesh: a national and sub-national analysis. BMC Infect Dis. 2022;22(1):1–8.

    Article  Google Scholar 

  16. Kabir A, Roy S, Begum K, Kabir AH, Miah MS. Factors influencing sanitation and hygiene practices among students in a public university in Bangladesh. PLoS ONE. 2021;16(9):e0257663.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  17. Bangladesh Demographic and Health Survey. 2007. National Institute of Population Research and Training, Medical Education and Family Welfare Division, Ministry of Health and Family Welfare, Dhaka, Bangladesh; 2007.

  18. Bangladesh Demographic and Health Survey. 2011. National Institute of Population Research and Training, Mitra and Associates, Dhaka, Bangladesh, MEASURE DHS, ICF International Calverton, Maryland, U.S.A.; 2011.

  19. Bangladesh Demographic and Health Survey. 2014. National Institute of Population Research and Training, Ministry of Health and Family Welfare, Bangladesh, Mitra and Associates, Dhaka, Bangladesh, The DHS Program, ICF International, Rockville, Maryland, U.S.A.; 2014.

  20. Bangladesh Demographic and Health Survey 2017-18. National Institute of Population Research and Training, Medical Education and Family Welfare Division, Ministry of Health and Family Welfare, Dhaka, Bangladesh, The DHS Program, ICF, Rockville, Maryland, USA; 2017-18.

  21. Wikipedia. Bangladesh W. ; 2023 [Available from:

  22. Wagstaff A. The concentration index of a binary outcome revisited. Health Econ. 2011;20(10):1155–60.

    Article  PubMed  Google Scholar 

  23. O’donnell O, Van Doorslaer E, Rannan-Eliya RP, Somanathan A, Adhikari SR, Akkazieva B, et al. Who pays for health care in Asia? J Health Econ. 2008;27(2):460–75.

    Article  PubMed  Google Scholar 

  24. O’Donnell O, O’Neill S, Van Ourti T, Walsh B. Conindex: estimation of concentration indices. Stata J. 2016;16(1):112–38.

    Article  PubMed  PubMed Central  Google Scholar 

  25. Nhamo G, Nhemachena C, Nhamo S. Is 2030 too soon for Africa to achieve the water and sanitation sustainable development goal? Sci Total Environ. 2019;669:129–39.

    Article  CAS  PubMed  Google Scholar 

  26. Kanyangarara M, Allen S, Jiwani SS. Access to water, sanitation and hygiene services in health facilities in sub-saharan Africa 2013–2018: results of health facility surveys and implications for COVID-19 transmission. BMC Health Serv Res. 2021;21(1):1–11.

    Article  Google Scholar 

  27. Deshpande A, Miller-Petrie MK, Lindstedt PA, Baumann MM, Johnson KB, Blacker BF, et al. Mapping geographical inequalities in access to drinking water and sanitation facilities in low-income and middle-income countries, 2000–17. The Lancet Global Health. 2020;8(9):e1162–e85.

    Article  Google Scholar 

  28. Tuyet-Hanh TT, Lee J-K, Oh J, Van Minh H, Ou Lee C, Hoan LT, et al. Household trends in access to improved water sources and sanitation facilities in Vietnam and associated factors: findings from the multiple Indicator cluster surveys, 2000–2011. Global Health Action. 2016;9(1):29434.

    Article  PubMed  Google Scholar 

  29. Mallick R, Mandal S, Chouhan P. Impact of sanitation and clean drinking water on the prevalence of diarrhea among the under-five children in India. Child Youth Serv Rev. 2020;118:105478.

    Article  Google Scholar 

  30. Jannat S, Sifat RI, Khisa M. Sexual and reproductive health conditions of women: insights from Rohingya Refugee women in Bangladesh. Sexuality Res Social Policy. 2022:1–14.

  31. Jannat S, Sifat RI, Khisa M. Sexual and Reproductive Health conditions of women: insights from Rohingya Refugee women in Bangladesh. Sexuality Res Social Policy. 2023;20(3):855–68.

    Article  Google Scholar 

  32. Mulenga JN, Bwalya BB, Chishimba KK. Determinants and inequalities in access to improved water sources and sanitation among the Zambian households. 2017.

  33. Akpakli DE, Manyeh AK, Akpakli JK, Kukula V, Gyapong M. Determinants of access to improved sanitation facilities in rural districts of southern Ghana: evidence from Dodowa Health and demographic surveillance site. BMC Res Notes. 2018;11(1):1–7.

    Article  Google Scholar 

  34. Yang H, Bain R, Bartram J, Gundry S, Pedley S, Wright J. Water safety and inequality in access to drinking-water between rich and poor households. Environ Sci Technol. 2013;47(3):1222–30.

    Article  CAS  PubMed  Google Scholar 

  35. Lawrence PR, Meigh J, Sullivan C. The water poverty index: an international comparison. Citeseer; 2002.

  36. Pullan RL, Freeman MC, Gething PW, Brooker SJ. Geographical inequalities in use of improved drinking water supply and sanitation across sub-saharan Africa: mapping and spatial analysis of cross-sectional survey data. PLoS Med. 2014;11(4):e1001626.

    Article  PubMed  PubMed Central  Google Scholar 

  37. Nhapi TG. Socioeconomic barriers to universal health coverage in Zimbabwe: Present issues and pathways toward progress. J Developing Soc. 2019;35(1):153–74.

    Article  Google Scholar 

  38. Pratiwi AB, Setiyaningsih H, Kok MO, Hoekstra T, Mukti AG, Pisani E. Is Indonesia achieving universal health coverage? Secondary analysis of national data on insurance coverage, health spending and service availability. BMJ open. 2021;11(10):e050565.

    Article  PubMed  PubMed Central  Google Scholar 

  39. Abubakar IR. Access to sanitation facilities among Nigerian households: determinants and sustainability implications. Sustainability. 2017;9(4):547.

    Article  Google Scholar 


  41. Ordinioha B, Owhondah G. Sanitation facilities and hygiene practices in a semi-urban community in Rivers State, south-south Nigeria. Nigerian Health Journal. 2008;8(1–2):10–5.

    Google Scholar 

  42. Okurut K, Kulabako R, Abbott P, Adogo J, Chenoweth J, Pedley S, et al. Access to improved sanitation facilities in low-income informal settlements of east African cities. J Water Sanitation Hygiene Dev. 2015;5(1):89–99.

    Article  Google Scholar 

  43. Kema K, Semali I, Mkuwa S, Kagonji I, Temu F, Ilako F et al. Factors affecting the utilisation of improved ventilated latrines among communities in Mtwara Rural District, Tanzania. Pan Afr Med J. 2012;13(Suppl 1).

  44. Hanchett S, Akhter S, Khan MH, Mezulianik S, Blagbrough V. Water, sanitation and hygiene in Bangladeshi slums: an evaluation of the WaterAid–Bangladesh urban programme. Environ Urbanization. 2003;15(2):43–56.

    Google Scholar 

  45. World Bank D. Population living in slums (% of urban population). World Bank Washington, DC; 2018.

  46. Haque SS, Yanez-Pagans M, Arias-Granada Y, Joseph G. Water and sanitation in Dhaka slums: access, quality, and informality in service provision. Water Int. 2020;45(7–8):791–811.

    Article  Google Scholar 

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icddr,b is grateful to the Governments of Bangladesh, Canada, Sweden and the UK for providing core/unrestricted support.


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AA1, QN, SEA, AER and TT Conceptualised the study. NS, DAP, EA, and NN conducted data analysis. AA1, AS, TST and FR wrote the manuscript. MH, ATH, AA2, MSB, AR, MKI, and MSA reviewed and edited the manuscript. Finally, all authors read the final version of the manuscript and approved accordingly.

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Correspondence to Anisuddin Ahmed.

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This study used publicly available data from DHS. Informed consent was obtained from all participants prior to the survey. The DHS Program adheres to ethical standards for protecting the privacy of respondents. The ICF International also ensures that the survey processes conform to the ethical requirements of the U.S. Department of Health and Human Services. No additional ethical approval was required, as the data is secondary and available to the general public.

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Ahmed, A., Sayeed, A., Tanwi, T.S. et al. Trends and inequity in improved sanitation facility utilisation in Bangladesh: Evidence from Bangladesh Demographic and Health Surveys. BMC Res Notes 16, 303 (2023).

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