Low prevalence of asthma in sub Saharan Africa: A cross sectional community survey in a suburban Nigerian town

Obaseki, Daniel O.; Awoniyi, Francis Olubanji; Awopeju, O.F.; Erhabor, Gregory E

doi:10.1016/j.rmed.2014.09.022

Cited by 9 publications

(8 citation statements)

References 35 publications

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“…This present study also demonstrates a high prevalence of allergic rhinitis (22.8%) comparable to previous reports in Nigeria and other parts of the world (9%-29.6%) [14,46–47]. We also substantiate a significant association between the co-existence (70–80%) of allergic rhinitis with asthma and the increased risk of asthma among persons with allergic rhinitis.…”

Section: Discussionsupporting

confidence: 91%

“…The low prevalence of physician diagnosed asthma among adults (4%) in this study is similar to the prevalence in many African countries, but lower than that in most Western European countries such as Australia and Sweden (20%) [27]. The lower prevalence of physician diagnosed asthma compared to clinical asthma in most African countries is likely to relate to limitations in access to health care services as we previously alluded to [13–14,31–32]. In Nigeria, low universal health coverage [33] particularly when put into the context of the very low earning ($100 monthly) by most households is an important constraint to accessing healthcare [34].…”

Section: Discussionsupporting

confidence: 62%

“…The low prevalence of clinical asthma in smaller cities is consistent with a previous report from another small town of Ile-Ife, South-West Nigeria. [14]. Although not shown to be independently associated with clinical asthma in this study, air pollution from rampant use of unclean cooking fuels in Nigeria is likely to contribute to increased levels of household air pollution and ambient air pollution [42].…”

Section: Discussionmentioning

confidence: 91%

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The prevalence of asthma and allergic rhinitis in Nigeria: A nationwide survey among children, adolescents and adults

et al. 2019

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PurposeAsthma is an important cause of morbidity and mortality worldwide and information on the prevalence of asthma in Nigeria is inconsistent. Nationally representative data, important for health planning is unavailable. We aimed to determine the current prevalence of asthma and allergic rhinitis in Nigeria.Materials and methodsA cross-sectional population survey conducted between June 2017 and March 2018 across five cities representing five geo-political zones in Nigeria. Validated screening questionnaires were used to identify persons with asthma and allergic rhinitis respectively. Asthma was defined as physician diagnosed asthma, clinical asthma and by presence of wheeze in the last 12 months respectively. Socio-demographic information, tobacco smoking, sources of household cooking fuel were also obtained.ResultsA total of 20063 participants from 6024 households were screened. The prevalence (95% confidence interval) of physician diagnosed asthma, clinical asthma and wheeze was 2.5% (2.3–2.7%), 6.4% (6.0–6.64%) and 9.0% (8.6–9.4%) respectively. The prevalence of allergic rhinitis was 22.8% (22.2–23.4%). The prevalence of asthma and rhinitis increased with age (prevalence of clinical asthma: 3.1% (2.8–3.4%), 9.8% (9.1–10.5) and 10.7% (9.4%-12.0) among 6–17 years, 18–45 years and >45 years respectively). Prevalence also varied across different cities with the highest prevalence of clinical asthma occurring in Lagos (8.0%) and the lowest in Ilorin (1.1%). The frequency of allergic rhinitis among persons with clinical asthma was 74.7%. Presence of allergic rhinitis, family history of asthma, current smoking and being overweight were independent determinants of current asthma among adults.ConclusionThe prevalence of asthma and allergic rhinitis in Nigeria is high with variabilities across regions and age groups. The number of persons with clinical asthma in Nigeria (approximately 13 million) is likely to rank among the highest in Africa. This warrants prioritization by stakeholders and policy makers to actively implement risk reduction measures and increase investment in capacity building for the diagnosis and treatment of asthma and allergic rhinitis.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 91%

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The prevalence of asthma and allergic rhinitis in Nigeria: A nationwide survey among children, adolescents and adults

et al. 2019

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“…The general characteristics (age, gender, residence) of the respondents were almost similar to those described by Pefura-Yone in Cameroon [19] and Obaseki in Nigeria [32]. The young age may be explained by the early onset of asthma, which is the most common chronic disease affecting children [33].…”

Section: Discussionmentioning

confidence: 75%

Prevalence and determinants of asthma in adults in Kinshasa

et al. 2017

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BackgroundEpidemiological data on asthma among adults in sub-Saharan Africa are sparse.ObjectiveTo determine the prevalence of and factors associated with asthma among adults in Kinshasa.MethodsA previously validated asthma questionnaire was administered to an adult population aged ≥18 years in urban and peri-urban suburbs of Kinshasa. A random stratified multi-stage sampling plan was used to select the study participants. Logistic regression was used to identify factors associated with asthma.ResultsThe mean age of respondents was 36.7 (SD 15.36) years, 75% lived in an urban environment, and 57% were women. The prevalence of asthma-ever was 6.9% (95% CI: 5.4–8.4). Among asthmatic patients, intermittent asthma was estimated at 75.7% and severe asthma at 9.3%. Family atopy (OR: 3.97; 95% CI: 2.42–6.50; p<0.001), and the presence of a cat in the house (OR: 1.82; 95% CI: 1.01–3.28; p = 0.045) were associated with self-reported asthma.ConclusionAsthma is relatively frequent in adults in Kinshasa, a prevalence similar to those reported elsewhere in Africa. Family atopy and the presence of a cat in the house could be the most common determinants to be confirmed with national survey in order to design guidelines for the control of asthma.

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“…Previously published studies evaluating the prevalence of BA have demonstrated that BA prevalence varies across different countries/populations [ 5 – 21 ]., Although the prevalence of BA has been estimated in CIS and post-soviet countries (e.g. Russia) as a part of global surveys or in separate studies, there is lack of large epidemiologic analyses of BA prevalence in the Commonwealth of Independent States (CIS) area.…”

Section: Introductionmentioning

confidence: 99%

The prevalence, burden and risk factors associated with bronchial asthma in commonwealth of independent states countries (Ukraine, Kazakhstan and Azerbaijan): results of the CORE study

Nugmanova

Sokolova

Feshchenko³

et al. 2018

BMC Pulm Med

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BackgroundIn the Commonwealth of Independent States (CIS) countries epidemiology of Bronchial Asthma (BA) is poorly characterized. The objective of this analysis is to present the prevalence, burden and risk factors associated with BA in the CIS countries as part of the CORE study (Chronic Obstructive REspiratory diseases).MethodsA total of 2842 adults (≥18 years) were recruited (964 in Kiev, Ukraine, 945 in Almaty, Kazakhstan, and 933 in Baku, Azerbaijan) in 2013–2015 during household visits. A two-step cluster random sampling strategy was used. All respondents were interviewed about respiratory symptoms, smoking, medical history. Two definitions were used: (i) “doctor diagnosed asthma” when the respondent reported that he/she had ever been diagnosed with BA by a doctor, (ii) “wheezing symptoms” (when the respondent reported wheezing at the ATS Respiratory Symptoms Questionnaire during the study) using GINA (2012) recommendations. Chi-square tests were used to assess differences in proportions. Binary logistic regression was used to estimate odds ratios (OR) and 95% CI for association between risk factors and BA.ResultsPrevalence of “doctor diagnosed asthma” was 12.5, 19.0 and 26.8 per 1000 persons, and prevalence of “wheezing symptoms” was 74.4, 254.8 and 123.4 per 1000 in Ukraine, Kazakhstan, and Azerbaijan, respectively. Statistically significant relationship with “wheezing symptoms” was shown for smoking (OR 1.99 (CI 1.22–3.27) in Ukraine, 2.08 (CI 1.54–2.81) in Kazakhstan, 8.01 (CI 5.24–12.24) in Azerbaijan); overweight/obesity (OR: 1.66 (CI 1.02–2.72); 1.94 (CI 1.44–2.62); 1.77 (CI 1.18–2.68), respectively) and dusty work (OR: 3.29 (CI 1.57–6.89); 1.68 (CI 1.18–2.39); 2.36 (CI 1.56–3.59), respectively), and for tuberculosis in Azerbaijan (OR: 10.11 (CI 3.44–29.69)). Co-morbidities like hypertension, cardiovascular diseases, abnormal blood lipids and a history of pneumonia occurred significantly (p < 0.05) more frequently in respondents with BA compared to those without BA across all participating countries.ConclusionIn CIS countries (Ukraine, Kazakhstan and Azerbaijan) the prevalence of doctor diagnosed asthma was significantly lower compared to prevalence of wheezing symptoms underlining that BA is likely to be underreported in these countries. The information provided in this paper will be helpful for healthcare policy makers in CIS countries to instruct BA management strategies and to allocate healthcare resources accordingly.

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Low prevalence of asthma in sub Saharan Africa: A cross sectional community survey in a suburban Nigerian town

Abstract: The prevalence of asthma in this suburban Nigerian population is low. Determinants of adult asthma distribution in low-income setting need further clarification.

Cited by 9 publications

References 35 publications

The prevalence of asthma and allergic rhinitis in Nigeria: A nationwide survey among children, adolescents and adults

The prevalence of asthma and allergic rhinitis in Nigeria: A nationwide survey among children, adolescents and adults

Prevalence and determinants of asthma in adults in Kinshasa

The prevalence, burden and risk factors associated with bronchial asthma in commonwealth of independent states countries (Ukraine, Kazakhstan and Azerbaijan): results of the CORE study

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