Raaj Kishore Biswas

Mr. Raaj Kishore Biswas

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Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 November 2017 in PLOS ONE
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RBRaaj Kishore Biswas
Raaj Kishore Biswas
NRNusma Rahman
Nusma Rahman
EKEnamul Kabir
Enamul Kabir
FRFarabi Raihan
Farabi Raihan
Bangladesh is a culturally conservative nation with limited freedom for women. A number of studies have evaluated intimate partner violence (IPV) and spousal physical violence in Bangladesh; however, the views of women have been rarely discussed in a quantitative manner. Three nationwide surveys in Bangladesh (2007, 2011, and 2014) were analyzed in this study to characterize the most vulnerable households, where women themselves accepted spousal physical violence as a general norm. 31.3%, 31.9% and 28.7% women in the surveys found justification for physical violence in household in 2007, 2011 and 2014 respectively. The binary logistic model showed wealth index, education of both women and their partner, religion, geographical division, decision making freedom and marital age as significant household contributors for women’s perspective in all the three years. Women in rich households and the highly educated were found to be 40% and 50% less likely to accept domestic physical violence compared to the poorest and illiterate women. Similarly, women who got married before 18 years were 20% more likely accept physical violence in the family as a norm. Apart from these particular groups (richest, highly educated and married after 18 years), other groups had around 30% acceptance rate of household violence. For any successful attempt to reduce spousal physical violence in the traditional patriarchal society of Bangladesh, interventions must target the most vulnerable households and the geographical areas where women experience spousal violence. Although this paper focuses on women’s attitudes, it is important that any intervention scheme should be devised to target both men and women.

21 April 2020 in PLOS ONE
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JBJahar Bhowmik
Jahar Bhowmik
RBRaaj Kishore Biswas
Raaj Kishore Biswas
NANurjahan Ananna
Nurjahan Ananna
The objective of Sustainable Development Goal 3.1 is to reduce the global maternal mortality ratio (MMR) below 70 per 100,000 live births by 2030. One of the indicators for this objective is the proportion of births attended by skilled health attendants (SBA). This study assessed the progress of low- and middle-income countries from South and Southeast Asian (SSEA) region in SBA coverage and evaluated the contribution of women’s education in this progression. The Demographic and Health Surveys were assessed, which included 38 nationally representative surveys on women aged between 15-49 years from 10 selected SSEA region countries in past 30 years. Binary Logistic regression models were fitted adjusting the survey clusters, strata and sampling weights. Meta-analyses were conducted by collapsing effect sizes and confidence intervals of education modeled on SBA coverage. Results indicated that Cambodia, Indonesia and Philippines had over 80% SBA coverage after 2010, whereas Bangladesh and Afghanistan had around 50% coverage. Women with primary, secondary and higher level of education were 1.65, 2.21 and 3.14 times significantly more likely to access SBA care during childbirth respectively as compared to women with no education, suggesting that education is a key factor to address skilled delivery cares in the SSEA region. Evaluation of the existing skilled birth attendance policies at the national level could provide useful insight for the decision makers to improve access to skilled care at birth by investing on women’s education in remote and rural areas.

15 April 2025 in Circulation
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ESEmmanuel Stamatakis
Emmanuel Stamatakis
RBRaaj Kishore Biswas
Raaj Kishore Biswas
Nicholas Andrew KoemelNicholas Andrew Koemel
Nicholas Andrew Koemel
ASAngelo Sabag
Angelo Sabag
RPRichard M Pulsford
Richard M Pulsford
MAMatthew Ahmadi
Matthew Ahmadi
BACKGROUND: Few middle-aged and older adults engage in regular leisure-time exercise. Incidental physical activity (IPA) encompasses activities of daily living outside the leisure-time domain. No dose-response study is available to guide IPA-focused interventions and guidelines. We examined the associations of device-assessed IPA intensities (vigorous [VIPA], moderate [MIPA], light [LIPA]) with major adverse cardiovascular events (MACE) and mortality, and we estimated the “health equivalence” of LIPA and MIPA against 1 minute of VIPA. METHODS: A total of 24 139 nonexercisers from the 2013 to 2015 UK Biobank accelerometry substudy (56.2% women) with a mean±SD age of 61.9±7.6 years were analyzed using a prospective cohort design. IPA energy expenditure and daily durations of VIPA, MIPA, and LIPA were calculated with a validated machine learning-based intensity classifier. MACE included incident stroke, myocardial infarction, and heart failure; CVD death; CVD mortality; and all-cause mortality. RESULTS: Analyses included 22 107 (MACE), 22 174 (CVD mortality), and 24 139 (all-cause mortality) participants, corresponding to 908/223/1071 events over 7.9 years of follow-up. IPA volume exhibited an L-shaped association with a nadir at ≈35 to 38 kJ·kg −1 ·d −1 , corresponding to hazard ratios of 0.49 (95% CI, 0.39–0.61) for MACE, 0.33 (95% CI, 0.22–0.52) for CVD mortality, and 0.31 (95% CI, 0.25–0.38) for all-cause mortality. Any amounts of VIPA or MIPA were associated with lower risk, with a plateau of ≈14 minutes per day (VIPA) and 34 to 50 minutes per day (MIPA). The median VIPA (4.6 min/d) and MIPA (23.8 min/d) durations were associated with CVD mortality hazard ratio of 0.62 (95% CI, 0.46–0.83) and 0.50 (95% CI, 0.31–0.80), respectively. LIPA showed a subtle inverse gradient which was statistically significant only for CVD mortality at levels >130 minutes per day. One minute of VIPA was equivalent to 2.8 (MACE) to 3.4 (CVD mortality) minutes of MIPA and 34.7 (CVD mortality) to 48.5 (MACE) minutes of LIPA. CONCLUSIONS: Any daily IPA amount of vigorous or moderate intensity was associated with lower CVD risk in a dose-response manner. LIPA had weak associations with all outcomes. One minute of vigorous or ≈3.0 to 3.5 minutes of moderate IPA was associated with a similar degree of lower CVD risk. Our findings highlight the potential cardiovascular health value of incidental physical activity, especially for people who struggle to do structured exercise.

15 April 2021 in BMJ Open
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AAAwan Afiaz
Awan Afiaz
RBRaaj Kishore Biswas
Raaj Kishore Biswas
Objectives Menstrual hygiene management (MHM) has become a growing public health concern in many low-income and middle-income nations for its association with several health risks. This study observed types of menstrual absorbents used among women in Bangladesh and analysed the associated sociodemographic factors with the hypothesis that mass media can increase awareness regarding MHM. The study includes recommendations for possible intervention strategies designed to address this lack of awareness. Design and participants The analysis used the data from the nationally representative Bangladesh Multiple Indicator Cluster Survey 2019 that employed a two-stage, stratified cluster sampling approach, with a study sample of 54 242 women aged between 15 and 49 years. A generalised linear model was fitted to the data adjusting for survey weights and cluster/strata variations along with bivariate analyses and spatial mapping. Results Only a quarter of women (24.3%) used modern absorbents for MHM with most resorting to unhygienic traditional practices. Spatial distribution showed that the use of modern absorbent of MHM was limited to the major cities. The women who had mobile phones and regular access to the media were nearly 43% (adjusted OR (AOR) 1.43 with 95% CI 1.33 to 1.54) and 47% (AOR 1.47 with 95% CI 1.35 to 1.60) more likely to use the modern absorbents of MHM, respectively. Furthermore, educated women living in urban solvent households with educated house heads were also found to use modern absorbents of MHM. Conclusions There appeared to be scope for interventions through a combined national effort to raise awareness using multifaceted media channels regarding MHM among women in order to meet the Sustainable Development Goals 3.7 and 6.2 of addressing women’s healthcare and hygiene needs.

27 November 2024 in Journal of Epidemiology and Community Health
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Jean-Philippe ChaputJean-Philippe Chaput
Jean-Philippe Chaput
RBRaaj Kishore Biswas
Raaj Kishore Biswas
MAMatthew Ahmadi
Matthew Ahmadi
PCPeter Cistulli
Peter Cistulli
Shantha RajaratnamShantha Rajaratnam
Shantha Rajaratnam
ESEmmanuel Stamatakis
Emmanuel Stamatakis
Background This study examines the associations between device-measured sleep regularity and the risk of major adverse cardiovascular events (MACE), and aims to determine whether sufficient sleep duration attenuates or eliminates the effects of irregular sleep on MACE risk. Methods A prospective cohort study of adults aged 40–79 years from the UK Biobank who wore wrist-attached accelerometers for 7 days was conducted. Sleep Regularity Index (SRI) scores were calculated for each participant using a validated algorithm, and categorised as irregular (SRI 87.3 (reference group)). Information on MACE and its subtypes (myocardial infarction, heart failure, stroke) was obtained from inpatient hospitalisation and death records. Results We analysed data from 72 269 individuals followed for 8 years, without a previous history of MACE and without an event in the first year of follow-up. Irregular (HR 1.26, 95% CI 1.16 to 1.37) and moderately irregular sleepers (HR 1.08, 95% CI 1.01 to 1.70) were at higher risk of MACE compared with regular sleepers. Dose-response analyses treating SRI as a continuous measure showed that SRI was associated with MACE risk in a near-linear fashion, with a steeper MACE risk reduction at higher (better) SRI scores. Joint SRI and sleep duration analyses showed that meeting the age-specific sleep duration recommendation offsets MACE risk for moderately irregular sleepers (HR 1.07, 95% CI 0.96 to 1.18), but not for irregular sleepers (HR 1.19, 95% CI 1.06 to 1.35). Conclusions Irregular sleep was strongly associated with higher MACE risk. Adequate sleep duration was not sufficient to offset these adverse effects among irregular sleepers. This study supports the inclusion of sleep regularity in public health guidelines and clinical practice as a risk factor for cardiovascular disease.