| 1. |
- Nug, Aguh Akeh, et al.
(författare)
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Monitoring Particulate Matter Air Pollution in Urban Centers: New Insights from Douala, Cameroon
- 2021
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Ingår i: Athens Journal of Sciences. - : Athens Institute for Education and Research ATINER. - 2241-8466. ; 8:2, s. 81-104
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Tidskriftsartikel (refereegranskat)abstract
- Air quality progressively deteriorates as urbanization, motorization and economic activities increase. Aerosol particles smaller than 2.5µm (PM2.5), a widespread form of pollution is an emergent threat to human health, the environment, quality of life, and the world’s climate. The composition of these particles is an important aspect of interest not only related to possible health and environmental effects of the elemental content but the elemental determination which also adds valuable information for source apportionment. This study investigates and evaluates the level of PM2.5 in Douala, Cameroon. Particles were collected using a cyclone that separates the PM2.5 from the air stream and impacts them on polycarbonate filters which were changed every 24-hour sampling period. Samples were analyzed for particulate mass concentration, black carbon (BC) and trace elements. Trace element analysis was done by EDXRF (energy dispersive x-ray fluorescence spectroscopy). Cl, K, Ca, Ti, Mn, Fe, Ni, Cu, Zn, Br, Sr, and Pb were identified and quantified for samples. Local meteorology was used to study variations in PM2.5 mass concentrations. Possible sources for the pollutants were also investigated. The mean particle mass concentration was 252 ± 130μg/m3 while BC attained a maximum of 6.993μg/m3. The influence of leaded gasoline was inferred while combustion and road traffic were identified as the major anthropogenic sources. Trends in meteorological parameters were influenced by thunderstorms. Sea spray was identified as another major contributor to aerosol PM. This study highlights high pollution levels in Douala.
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| 2. |
- Strömdahl, Susanne, et al.
(författare)
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An assessment of stigma and human right violations among men who have sex with men in Abuja, Nigeria
- 2019
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Ingår i: BMC International Health and Human Rights. - : BMC. - 1472-698X. ; 19
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Tidskriftsartikel (refereegranskat)abstract
- Background: There have been several barriers in effectively engaging men who have sex with men for STI/HIV prevention and treatment programming in Nigeria including social stigma, policies, and laws criminalizing same-sex practices. The objective of this study was to describe the human rights context for MSM in Abuja and characterize factors associated with having had a genital ulcer disease in the previous 12months, a health outcome associated with increased risk of HIV acquisition and transmission.Methods: A convenience sample of 297 men reporting ever having had anal intercourse with another man participated in the study in 2008. A structured survey instrument including sexual risk behaviour for STI/HIV, disclosure of sexual orientation, perceived and enacted human rights violations were performed. Descriptive and inferential data analyses were conducted using Stata11 software.Results: 36% reported having been discriminated due to sexual orientation and 17% reported being afraid to walk the streets of their community. Enacted rights violations included 41% having been blackmailed, 36% been beaten, 13% been denied housing, and 11% been jailed due to sexual orientation. Having been blackmailed due to sexual orientation (aOR 3.40, 95%CI: 1.35-8.56) was significantly associated with reporting having had a genital ulcer in the last 12months. Having been beaten due to sexual orientation (aOR 2.36, 95%CI:0.96-5.82) was moderately significantly associated with reporting having had a genital ulcer in the last 12months.Conclusions: High levels of experienced stigma, discrimination and human rights violations among MSM in Abuja was reported, constituting structural risks that are linked to sexual risk behaviour for STI/HIV. Given data on the high prevalence and incidence of HIV among MSM in Abuja, these findings reinforce the need for structural interventions to mediate access to STI/HIV prevention and treatment services.
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| 3. |
- Strömdahl, Susanne, et al.
(författare)
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Associations of consistent condom use among men who have sex with men in Abuja, Nigeria.
- 2012
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Ingår i: AIDS Research and Human Retroviruses. - 0889-2229 .- 1931-8405. ; 28:12, s. 1756-62
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Tidskriftsartikel (refereegranskat)abstract
- The objective of the study was to characterize factors associated with consistent condom use among men who had sex with men (MSM) in Abuja, Nigeria. A convenience sample consisting of 297 MSM was recruited during 2008 using a combination of peer referral and venue-based sampling. Descriptive statistics with chi square and t-test were used for demographic, sexual identity, and practices variables. Univariate and multivariate logistic regressions were used to identify factors associated with consistent condom use with male partners in the past 6 months. Approximately more than half (53%, n=155/290) reported always using condoms with male partner in the past 6 months and 43% (n=95/219) reported always using condoms with female partners in the past 6 months. In all, 11% (n=16/144) reported always engaging in safe sex defined as always using condoms with both male and female partners and always using a water-based condom compatible lubricant with male partners in the past 6 months. Independent associations with consistent condom use with male partners in the past 6 months were knowledge of at least one sexually transmitted infection (STI) that can be transmitted through unprotected anal intercourse (OR 2.47, 95% CI: 1.27-4.83, p<0.01) and having been tested for HIV (OR 2.40, 95% CI: 1.27-4.54, p<0.01). MSM who had been HIV tested at least once were more likely to use condoms consistently during anal intercourse in multivariate analyses. In addition, STI knowledge was also associated with consistent condom use during anal intercourse implying that interventions targeting high-risk practices are effective as HIV prevention for this high-risk group. Future directions include intervention research to determine the appropriate package of services for MSM in Nigeria. In addition, implementation science evaluations of how best to operationalize combination HIV prevention interventions for MSM given the criminalization and stigmatization of same-sex practices are crucial.
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| 4. |
- Wang, Haidong, et al.
(författare)
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Global, regional, and national life expectancy, all-cause mortality, and cause-specific mortality for 249 causes of death, 1980-2015 : a systematic analysis for the Global Burden of Disease Study 2015
- 2016
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Ingår i: The Lancet. - 0140-6736 .- 1474-547X. ; 388:10053, s. 1459-1544
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Improving survival and extending the longevity of life for all populations requires timely, robust evidence on local mortality levels and trends. The Global Burden of Disease 2015 Study (GBD 2015) provides a comprehensive assessment of all-cause and cause-specific mortality for 249 causes in 195 countries and territories from 1980 to 2015. These results informed an in-depth investigation of observed and expected mortality patterns based on sociodemographic measures.METHODS: We estimated all-cause mortality by age, sex, geography, and year using an improved analytical approach originally developed for GBD 2013 and GBD 2010. Improvements included refinements to the estimation of child and adult mortality and corresponding uncertainty, parameter selection for under-5 mortality synthesis by spatiotemporal Gaussian process regression, and sibling history data processing. We also expanded the database of vital registration, survey, and census data to 14 294 geography-year datapoints. For GBD 2015, eight causes, including Ebola virus disease, were added to the previous GBD cause list for mortality. We used six modelling approaches to assess cause-specific mortality, with the Cause of Death Ensemble Model (CODEm) generating estimates for most causes. We used a series of novel analyses to systematically quantify the drivers of trends in mortality across geographies. First, we assessed observed and expected levels and trends of cause-specific mortality as they relate to the Socio-demographic Index (SDI), a summary indicator derived from measures of income per capita, educational attainment, and fertility. Second, we examined factors affecting total mortality patterns through a series of counterfactual scenarios, testing the magnitude by which population growth, population age structures, and epidemiological changes contributed to shifts in mortality. Finally, we attributed changes in life expectancy to changes in cause of death. We documented each step of the GBD 2015 estimation processes, as well as data sources, in accordance with Guidelines for Accurate and Transparent Health Estimates Reporting (GATHER).FINDINGS: Globally, life expectancy from birth increased from 61·7 years (95% uncertainty interval 61·4-61·9) in 1980 to 71·8 years (71·5-72·2) in 2015. Several countries in sub-Saharan Africa had very large gains in life expectancy from 2005 to 2015, rebounding from an era of exceedingly high loss of life due to HIV/AIDS. At the same time, many geographies saw life expectancy stagnate or decline, particularly for men and in countries with rising mortality from war or interpersonal violence. From 2005 to 2015, male life expectancy in Syria dropped by 11·3 years (3·7-17·4), to 62·6 years (56·5-70·2). Total deaths increased by 4·1% (2·6-5·6) from 2005 to 2015, rising to 55·8 million (54·9 million to 56·6 million) in 2015, but age-standardised death rates fell by 17·0% (15·8-18·1) during this time, underscoring changes in population growth and shifts in global age structures. The result was similar for non-communicable diseases (NCDs), with total deaths from these causes increasing by 14·1% (12·6-16·0) to 39·8 million (39·2 million to 40·5 million) in 2015, whereas age-standardised rates decreased by 13·1% (11·9-14·3). Globally, this mortality pattern emerged for several NCDs, including several types of cancer, ischaemic heart disease, cirrhosis, and Alzheimer's disease and other dementias. By contrast, both total deaths and age-standardised death rates due to communicable, maternal, neonatal, and nutritional conditions significantly declined from 2005 to 2015, gains largely attributable to decreases in mortality rates due to HIV/AIDS (42·1%, 39·1-44·6), malaria (43·1%, 34·7-51·8), neonatal preterm birth complications (29·8%, 24·8-34·9), and maternal disorders (29·1%, 19·3-37·1). Progress was slower for several causes, such as lower respiratory infections and nutritional deficiencies, whereas deaths increased for others, including dengue and drug use disorders. Age-standardised death rates due to injuries significantly declined from 2005 to 2015, yet interpersonal violence and war claimed increasingly more lives in some regions, particularly in the Middle East. In 2015, rotaviral enteritis (rotavirus) was the leading cause of under-5 deaths due to diarrhoea (146 000 deaths, 118 000-183 000) and pneumococcal pneumonia was the leading cause of under-5 deaths due to lower respiratory infections (393 000 deaths, 228 000-532 000), although pathogen-specific mortality varied by region. Globally, the effects of population growth, ageing, and changes in age-standardised death rates substantially differed by cause. Our analyses on the expected associations between cause-specific mortality and SDI show the regular shifts in cause of death composition and population age structure with rising SDI. Country patterns of premature mortality (measured as years of life lost [YLLs]) and how they differ from the level expected on the basis of SDI alone revealed distinct but highly heterogeneous patterns by region and country or territory. Ischaemic heart disease, stroke, and diabetes were among the leading causes of YLLs in most regions, but in many cases, intraregional results sharply diverged for ratios of observed and expected YLLs based on SDI. Communicable, maternal, neonatal, and nutritional diseases caused the most YLLs throughout sub-Saharan Africa, with observed YLLs far exceeding expected YLLs for countries in which malaria or HIV/AIDS remained the leading causes of early death.INTERPRETATION: At the global scale, age-specific mortality has steadily improved over the past 35 years; this pattern of general progress continued in the past decade. Progress has been faster in most countries than expected on the basis of development measured by the SDI. Against this background of progress, some countries have seen falls in life expectancy, and age-standardised death rates for some causes are increasing. Despite progress in reducing age-standardised death rates, population growth and ageing mean that the number of deaths from most non-communicable causes are increasing in most countries, putting increased demands on health systems.
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