Browsing by Author "Nankya-Mutyoba, Joan"

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    The burden of hypertension in sub-Saharan Africa: a four-country cross sectional study
    (BMC public health, 2015) Guwatudde, David; Nankya-Mutyoba, Joan; Kalyesubula, Robert; Laurence, Carien; Adebamowo, Clement; Ajayi, IkeOluwapo; Bajunirwe, Francis; Njelekela, Marina; Chiwanga, Faraja S.; Reid, Todd; Volmink, Jimmy; Adami, Hans-Olov; Holmes, Michelle D.; Dalal, Shona
    Hypertension, the leading single cause of morbidity and mortality worldwide, is a growing public health problem in sub-Saharan Africa (SSA). Few studies have estimated and compared the burden of hypertension across different SSA populations. We conducted a cross-sectional analysis of blood pressure data collected through a cohort study in four SSA countries, to estimate the prevalence of pre-hypertension, the prevalence of hypertension, and to identify the factors associated with hypertension. Methods: Participants were from five different population groups defined by occupation and degree of urbanization, including rural and peri-urban residents in Uganda, school teachers in South Africa and Tanzania, and nurses in Nigeria. We used a standardized questionnaire to collect data on demographic and behavioral characteristics, injuries, and history of diagnoses of chronic diseases and mental health. We also made physical measurements (weight, height and blood pressure), as well as biochemical measurements; which followed standardized protocols across the country sites. Modified Poison regression modelling was used to estimate prevalence ratios (PR) as measures of association between potential risk factors and hypertension. Results: The overall age-standardized prevalence of hypertension among the 1216 participants was 25.9 %. Prevalence was highest among nurses with an age-standardized prevalence (ASP) of 25.8 %, followed by school teachers (ASP = 23.2 %), peri-urban residents (ASP = 20.5 %) and lowest among rural residents (ASP = 8.7 %). Only 50.0 % of participants with hypertension were aware of their raised blood pressure. The overall age-standardized prevalence of pre-hypertension was 21.0 %. Factors found to be associated with hypertension were: population group, older age, higher body mass index, higher fasting plasma glucose level, lower level of education, and tobacco use.
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    Consumption of processed food dietary patterns in four African populations
    (Public Health Nutrition, 2018) Holmes, Michelle D.; Dalal, Shona; Sewram, Vikash; Diamond, Megan B.; Adebamowo, Sally N.; Ajayi, Ikeoluwapo O.; Adebamowo, Clement; Chiwanga, Faraja S.; Njelekela, Marina; Laurence, Carien; Volmink, Jimmy; Bajunirwe, Francis; Nankya-Mutyoba, Joan; Guwatudde, David; Reid, Todd G.; Willett, Walter C.; Adami, Hans-Olov; Fung, Teresa T.
    To identify predominant dietary patterns in four African populations and examine their association with obesity. Design: Cross-sectional study. Setting/Subjects: We used data from the Africa/Harvard School of Public Health Partnership for Cohort Research and Training (PaCT) pilot study established to investigate the feasibility of a multi-country longitudinal study of noncommunicable chronic disease in sub-Saharan Africa. We applied principal component analysis to dietary intake data collected from an FFQ developed for PaCT to ascertain dietary patterns in Tanzania, South Africa, and peri-urban and rural Uganda. The sample consisted of 444 women and 294 men. Results: We identified two dietary patterns: the Mixed Diet pattern characterized by high intakes of unprocessed foods such as vegetables and fresh fish, but also cold cuts and refined grains; and the Processed Diet pattern characterized by high intakes of salad dressing, cold cuts and sweets. Women in the highest tertile of the Processed Diet pattern score were 3·00 times more likely to be overweight (95 % CI 1·66, 5·45; prevalence=74 %) and 4·24 times more likely to be obese (95 % CI 2·23, 8·05; prevalence=44 %) than women in this pattern’s lowest tertile (both P<0·0001; prevalence=47 and 14 %, respectively). We found similarly strong associations in men. There was no association between the Mixed Diet pattern and overweight or obesity. Conclusions: We identified two major dietary patterns in several African populations, a Mixed Diet pattern and a Processed Diet pattern. The Processed Diet pattern was associated with obesity.
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    Correlates of hepatitis B awareness and disease-specific knowledge among pregnant women in Northern and Central Uganda: a cross-sectional study
    (Hepatology, medicine and policy, 2018) Nankya-Mutyoba, Joan; Aizire, Jim; Makumbi, Fredrick; Atuyambe, Lynn; Ocama, Ponsiano; Kirk, Gregory D.
    Countries in sub-Saharan Africa with a high hepatitis B burden also have limited resources to identify underlying drivers of disease among key at-risk populations. To improve prioritization and strengthen prevention of mother to child transmission of HBV, it is imperative to understand disease awareness, knowledge and related factors among pregnant women. Objectives: This study assessed HBV disease awareness, knowledge and related factors among pregnant women in public health facilities in two regions with diverse HBV disease epidemiology. Methods: From October 2016 through December 2017, a random sample of 455 pregnant women attending antenatal clinics were surveyed to assess HBV awareness, knowledge and associated factors. Participants responded to an 18-item questionnaire with themes on HBV awareness, knowledge of disease signs and symptoms, transmission, prevention and misconceptions about the disease. Results were analysed in STATA (version 14.0). Results: Of 455 participants enrolled, about two thirds reported having heard about HBV disease. By region, nearly half (47%) of participants from the central region, compared to only 16% from the north, reported that they had never heard of HBV. Region of residence had a moderating effect on the education- HBV awareness relationship. Only 162/455 (36%) of participants had adequate HBV knowledge. More than half 256/455 (56%) and 242/455 (53%) were not knowledgeable about horizontal and mother to child HBV transmission, respectively. About two thirds 298/455 (66%) and 281/455 (62%) believed HBV was spread via sharing of utensils and mosquito bites respectively. In multiple regression analysis, residing in the north, (PR=1.91(1.53 -2.38), p < 0.001) compared to central region and having a secondary education (PR=1.87(1.37 -2.55), p < 0.001) compared to primary were statistically significantly related to being knowledgeable about HBV. Conclusion: We demonstrated marked regional differences in HBV disease awareness and knowledge in this high HBV prevalence setting. However, most pregnant women displayed unacceptably low HBV knowledge and a significant proportion still hold misconceptions about HBV. Interventions to improve HBV prevention through antenatal education will need to be tailored to existing differences in comprehensive HBV knowledge.
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    Feasibility of a large cohort study in sub-Saharan Africa assessed through a four-country study
    (Global Health Action, 2015) Dalal, Shona; Holmes, Michelle D.; Laurence, Carien; Bajunirwe, Francis; Guwatudde, David; Njelekela, Marina; Adebamowo, Clement; Nankya-Mutyoba, Joan; Chiwanga, Faraja S.; Volmink, Jimmy; Ajayi, Ikeoluwapo; Kalyesubula, Robert; Reid, Todd G.; Dockery, Douglas; Hemenway, David; Adami, Hans-Olov
    Large prospective epidemiologic studies are vital in determining disease etiology and forming national health policy. Yet, such studies do not exist in sub-Saharan Africa (SSA) notwithstanding the growing burden of chronic diseases. Objective: We explored the feasibility of establishing a large-scale multicountry prospective study at five sites in four sub-Saharan countries. Design: Based on country-specific considerations of feasibility, Nigeria enrolled health care professionals, South Africa and Tanzania enrolled teachers, and Uganda enrolled village residents at one rural and one periurban site each. All sites used a 6-month follow-up period but different approaches for data collection, namely standardized questionnaires filled out by participants or face-to-face interviews. Results: We enrolled 1415 participants from five sites (range 200489) with a median age of 41 years. Approximately half had access to clean-burning cooking fuel and 70% to piped drinking water, yet 92% had access to a mobile phone. The prevalence of chronic diseases was 49% among 45- to 54-year-olds and was dominated by hypertension (21.7% overall) ranging from 4.5 to 31.2% across sites and a serious injury in the past 12 months (12.4% overall). About 80% of participants indicated willingness to provide blood samples. At 6-month follow-up, 68% completed a questionnaire (45 to 96% across sites) with evidence that mobile phones were particularly useful. Conclusions: Our pilot study indicates that a large-scale prospective study in SSA is feasible, and the burden of chronic disease in SSA may already be substantial necessitating urgent etiologic research and primary prevention.
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    Hepatitis B Prevalence among Pregnant Women in Central and West Nile regions of Uganda: Is there a Need to prioritize Prevention of Mother to Child hepatitis B transmission?
    (Research Square, 2019) Nankya-Mutyoba, Joan; Aizire, Jim; Makumbi, Fredrick; Atuyambe, Lynn; Kirk, Gregory; Ocama, Ponsiano
    Introduction Within sub-Saharan Africa (SSA), the burden of chronic hepatitis B (HBV) is unacceptably high in several countries including Uganda. Elimination of HBV in the context of inadequate resources and several competing health issues, faces challenges including limited data on disease burden in important population sub-groups. In order to optimize available resources, reliable data on HBV among pregnant women is useful to guide policies on prevention. This study estimated HBV prevalence and related factors among pregnant women in Central and West Nile regions of Uganda Methods Using a twostage sampling approach, we selected a random sample of 310 pregnant women, 18 years or older from public health facility antenatal clinics in central and west Nile, North-western Uganda. Consenting women were interviewed to obtain data on HBV vaccination status, HIV status, selected sexual and lifestyle factors and socio-demographic information. In addition, they underwent phlebotomy to obtain blood for testing for hepatitis B surface antigen, (HBsAg) antibodies to the surface antigen (anti-HBs), and antibodies to the core (anti-HBc), as indicators of chronic infection, prior exposure, and susceptibility (anti-HBs <10 mIU /mL), respectively. Results Out of 310 women, prevalence of chronic HBV infection was 6.2%. Prevalence in the West Nile region was notably higher than in the Central region (11.0% vs. 1.3%), p<0.001. In both regions, majority of pregnant women (61% West Nile region, 76% Central region) were still susceptible to HBV. Overall, proportion who had been tested for HBV and those who reported having been vaccinated was only 5.8% and 11.3% respectively. Conclusion Our findings reveal the burden of HBV in Ugandan pregnant women is still high, with marked regional differences in disease prevalence, and poor levels of HBV testing and vaccination. These data suggest that HBV prevention programs and policies in resource-limited settings like Uganda may need to consider the differential HBV prevalence, as optimizing HBV prevention services in higher prevalence regions may provide greater impact and thereby align with the WHO recommendation on HBV elimination strategy in SSA.
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    Hepatitis B virus perceptions and health seeking behaviors among pregnant women in Uganda: implications for prevention and policy
    (BMC health services research, 2019) Nankya-Mutyoba, Joan; Aizire, Jim; Makumbi, Fredrick; Ocama, Ponsiano; Kirk, Gregory D.
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    Hepatitis C in Uganda: Identification of infected blood donors for micro-elimination
    (Journal of Virus Eradication, 2021) Nankya-Mutyoba, Joan; Apica, Betty S.; Otekat, Grace; Kyeyune, Dorothy B.; Nakyagaba, Lourita; Nabunje, Joletta; Nakafeero, Mary; Seremba, Emmanuel; Ocama, Ponsiano
    The drive to eliminate viral hepatitis by 2030 is underway. However, locally generated data on active infection is required to focus such efforts. We performed a regionally-inclusive survey to determine prevalence of active HCV, genotypes and related factors among Ugandan blood donors. Methods: Participants from regional blood banks and blood collection centers were surveyed for information on demographic, clinical and lifestyle factors. Blood was assayed for HCV infection, HCV genotypes and subtypes. Logistic regression was performed to determine factors associated with active HCV infection. Results: Of 1243 participants, 1041 (83.7%) were male, average age (SD), 27.7 (9.8). Prevalence of active HCV infection was 7.8% and we identified 3 genotypes. Median age (adj. OR (95% CI) = 1.03 (1.01–1.06), p-value = 0.040)), Northern region of birth versus Central or Eastern (adj. OR (95% CI) = 10.25 (2.65–39.68), p-value = 0.001)), Northern residence, versus Central or Eastern (adj. OR (95% CI) = 0.23 (0.08–0.65), p-value = 0.006)), and being married (versus single/divorced) adj. OR 2.49(1.3–4.79), p-value = 0.006 were associated with active HCV infection. Conclusion: Targeted interventions in at-risk populations coupled with linkage to care and treatment will help achieve the WHO elimination goals in this setting.
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    Herbal medicine use among patients with viral and non-viral Hepatitis in Uganda: prevalence, patterns and related factors
    (BMC complementary medicine and therapies, 2020) Nsibirwa, Sara; Anguzu, Godwin; Kamukama, Sam; Ocama, Ponsiano; Nankya-Mutyoba, Joan
    There is some evidence that patients with liver diseases commonly use complementary and alternative therapies to address general and liver-disease specific health concerns. The purpose of this study was to assess and describe prevalence, patterns and related factors of herbal medicine use among adults diagnosed with viral and non-viral hepatitis in Kampala, Uganda. A cross-sectional study was conducted on 310 adult patients attending the gastrointestinal clinic in Mulago hospital referral hospital in Kampala. Data on prevalence, types and reasons for herbal medicine use was collected using standardized questionnaires and focus group discussions. Modified Poisson regression analyses were used to examine factors related to use. Usage of various herbal remedies within 12 months prior to April 2018 was reported by 46.1% (143/310) of patients with 27.3% (39/143) of these reporting having used conventional and herbal therapies concurrently. Herbal remedies were used to treat various health conditions including hepatitis. Patients with hepatitis C virus infection (PRR = 1.16, p = 0.02) compared to those with hepatitis B virus infection, and those who believed that it was safe to use herbal and conventional therapies concurrently (PRR = 1.23, p = 0.008) had higher prevalence odds of herbal medicine use. Conversely, patients who had been newly diagnosed with hepatitis (PRR = 0.69, p = 0.03) compared to those who had been diagnosed more than one-year prior, had lower prevalence odds of herbal medicine use. Various types of local herbs were reported as most commonly used however most patients did not know the ingredients of commercially prepared herbal therapies. A high prevalence of herbal medicine use was found among newly-diagnosed patients and patients with hepatitis C more likely to use herbal remedies after adjusting for other factors. Usage was influenced by the belief that herbal medicine is safe and effective. Health workers need to consistently elicit information about herbal remedy use. Research is needed on benefits, adverse effects and outcomes in patients who use herbal remedies to treat primary liver diseases in order to facilitate evidence of efficacy and product safety.
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    Herbal medicine use among patients with viral and non-viral Hepatitis in Uganda: prevalence, patterns and related factors
    (BMC complementary medicine and therapies, 2020) Nsibirwa, Sara; Anguzu, Godwin; Kamukama, Sam; Ocama, Ponsiano; Nankya-Mutyoba, Joan
    There is some evidence that patients with liver diseases commonly use complementary and alternative therapies to address general and liver-disease specific health concerns. The purpose of this study was to assess and describe prevalence, patterns and related factors of herbal medicine use among adults diagnosed with viral and non-viral hepatitis in Kampala, Uganda. Methods: A cross-sectional study was conducted on 310 adult patients attending the gastrointestinal clinic in Mulago hospital referral hospital in Kampala. Data on prevalence, types and reasons for herbal medicine use was collected using standardized questionnaires and focus group discussions. Modified Poisson regression analyses were used to examine factors related to use. Results: Usage of various herbal remedies within 12 months prior to April 2018 was reported by 46.1% (143/310) of patients with 27.3% (39/143) of these reporting having used conventional and herbal therapies concurrently. Herbal remedies were used to treat various health conditions including hepatitis. Patients with hepatitis C virus infection (PRR = 1.16, p = 0.02) compared to those with hepatitis B virus infection, and those who believed that it was safe to use herbal and conventional therapies concurrently (PRR = 1.23, p = 0.008) had higher prevalence odds of herbal medicine use. Conversely, patients who had been newly diagnosed with hepatitis (PRR = 0.69, p = 0.03) compared to those who had been diagnosed more than one-year prior, had lower prevalence odds of herbal medicine use. Various types of local herbs were reported as most commonly used however most patients did not know the ingredients of commercially prepared herbal therapies. Conclusion: A high prevalence of herbal medicine use was found among newly-diagnosed patients and patients with hepatitis C more likely to use herbal remedies after adjusting for other factors. Usage was influenced by the belief that herbal medicine is safe and effective. Health workers need to consistently elicit information about herbal remedy use. Research is needed on benefits, adverse effects and outcomes in patients who use herbal remedies to treat primary liver diseases in order to facilitate evidence of efficacy and product safety.
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    Neighborhood greenness and burden of non-communicable diseases in Sub-Saharan Africa: A multi-country cross-sectional study
    (Environmental Research, 2021) Iyer, Hari S.; James, Peter; Valeri, Linda; Bajunirwe, Francis; Nankya-Mutyoba, Joan; Njelekela, Marina; Chiwanga, Faraja; Sewram, Vikash; Ajayi, IkeOluwapo; Adebamowo, Clement; Dalal, Shona; Reid, Todd G.; Rebbeck, Timothy R.; Adami, Hans-Olov; Holmes, Michelle D.
    Population growth, demographic transitions and urbanization in sub-Saharan Africa (SSA) will increase non-communicable disease (NCD) burden. We studied the association between neighborhood greenness and NCDs in a multi-country cross-sectional study. Among 1178 participants, in adjusted models, a 0.11 unit NDVI increase was associated with lower BMI (β: −1.01, 95% CI: −1.35, −0.67), and lower odds of overweight/obesity (aOR: 0.73, 95% CI: 0.62, 0.85), diabetes (aOR: 0.77, 95% CI: 0.62, 0.96), and having ≥3 allostatic load components compared to none (aOR: 0.66, 95% CI: 0.52, 0.85). Except for diabetes, these remained statistically significant after Bonferroni correction. We observed no association between NDVI and hypertension or cholesterol. Our findings are consistent with health benefits of neighborhood greenness reported in other countries, suggesting greening strategies could be considered as part of broader public health interventions for NCDs.
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    Prevalence and risk factor for injury in sub-Saharan Africa: a multicountry study
    (Injury prevention, 2018) Diamond, Megan B.; Dalal, Shona; Adebamowo, Clement; Guwatudde, David; Laurence, Carien; Ajayi, keoluwapo O.; Bajunirwe, Francis; Njelekela, Marina A.; Chiwanga, Faraja; Adami, Hans-Olov; Nankya-Mutyoba, Joan; Kalyesubula, Robert; Reid, Todd G.; Hemenway, David; Holmes, Michelle D.
    Injury-related morbidity is a neglected health concern in many low-income and middle-income countries. Most injury data in Africa have been collected from hospital-based studies, and few studies have occurred across multiple countries. Using data from a novel cohort, we examined the prevalence and incidence of serious injuries and associated risk factors across five sites in sub-Saharan Africa (SSA).A common baseline and follow-up survey was administered to participants. The study population included 1316 persons at baseline and 904 persons at follow-up. Frequencies were calculated, and logistic regression models were used to assess risk factors for injury.A total of 233 (17.7%) persons reported a serious injury at baseline and 60 (6.6%) reported a serious injury 6 months later at follow-up. Sixty-nine per cent of participants responded to the follow-up questionnaire. At baseline and follow-up, the most common cause of serious injury at urban sites was transport related, followed by poison/overdose. In rural Uganda, sharp instruments injuries were most common, followed by transport-related injuries. Living at an urban site was associated with an increased odds for serious injury compared with those at the rural site (OR: 1.83, 95% CI 1.15 to 2.90). Participants who consumed above a moderate amount of alcohol were at a higher risk of serious injury compared with those who did not consume alcohol (OR: 1.86, 95% CI 1.02 to 3.41). High level of education was an important risk factor for injury.At baseline and follow-up, common causes of serious injury were transport related, sharp instrument and poison/overdose. Alcohol consumption, urban location and education are important risk factors for injury. It is feasible to collect longitudinal injury data using a standardised questionnaire across multiples sites in SSA. Longitudinal data collection should be leveraged to obtain robust data on risk factors for injury in SSA.
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    Urban and rural prevalence of diabetes and prediabetes and risk factors associated with diabetes in Tanzania and Uganda
    (Global Health Action, 2016) Chiwanga, Faraja S.; Njelekela, Marina A.; Diamond, Megan B.; Bajunirwe, Francis; Guwatudde, David; Nankya-Mutyoba, Joan; Kalyesubula, Robert; Adebamowo, Clement; Ajayi, IkeOluwapo; Reid, Todd G.; Volmink, Jimmy; Laurence, Carien; Dalal, Shona
    The increase in prevalence of diabetes and pre-diabetes in sub-Saharan Africa underlines the importance of understanding its magnitude and causes in different population groups. We analyzed data from the Africa/Harvard Partnership for Cohort Research and Training (PaCT) studies to determine the prevalence of diabetes and pre-diabetes and risk factors associated with diabetes. Methodology: Participants were randomly selected from peri-urban (n 297) and rural (n 200) communities in Uganda, and teachers were recruited from schools (n 229) in urban Tanzania. We used a standardized questionnaire to collect socio-demographic and self-reported disease status including diabetes status. Blood glucose was also measured after participants fasted for 8 h. We used standard protocols for anthropometric and blood pressure measurement. Results: The overall prevalence of diabetes was 10.1% and was highest in rural Ugandan residents (16.1%) compared to teachers in Tanzania (8.3%) and peri-urban Ugandan residents (7.6%). The prevalence of prediabetes was 13.8%. The prevalence of self-reported diabetes was low across all sites, where 68% of participants with diabetes were not captured by self-report. In multivariable logistic regression analysis, family history (OR 2.5, 95% CI: 1.1, 5.6) and hypertension (OR 2.3, 95% CI: 1.1, 5.2) were significantly associated with diabetes. Conclusions: The prevalence of diabetes and pre-diabetes in Uganda and Tanzania is high, differs markedly between population groups, and remains undiagnosed in an alarmingly high proportion of individuals. These findings highlight the need for large-scale, prospective studies to accurately quantify the burden and identify effective intervention and treatment strategies across diverse African populations.