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Using Theory of Change in the development, implementation and evaluation of complex health interventions. A practical guide

Mary De Silva, Lucy Lee& Grace Ryan The Centre for Global Mental Health &the Mental Health Innovation Network (2015) C1

This guide provides a practical overview of the process of developing a Theory of Change, focusing on using a stakeholder-driven, workshop approach to achieve this.

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Achieving Control of Asthma in Children in Africa (ACACIA): protocol of an observational study of children’s lung health in six sub-Saharan African countries

Mosler, G.; Oyenuga, V.; Addo-Yobo, E. et al. BMJ Open (2020) CC

Little is known about asthma control in the rising number of African children who suffer from this condition. The Achieving Control of Asthma in Children in Africa (ACACIA) study is an observational study collecting evidence about paediatric asthma in urban areas of Ghana, Malawi, Nigeria, South Afr... more

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Worldwide trends in the burden of asthma symptoms in school-aged children: Global Asthma Network Phase I cross-sectional study

Asher, I.; Rutter, C.E.; Bissell, K. et al. The Lancet (2021) CC

Asthma is the most common chronic disease in children globally. The Global Asthma Network (GAN) Phase I study aimed to determine if the worldwide burden of asthma symptoms is changing. This updated cross-sectional study used the same methods as the International study of Asthma and Allergies in Chi...ldhood (ISAAC) Phase III. Asthma symptoms were assessed from centres that completed GAN Phase I and ISAAC Phase I (1993–95), ISAAC Phase III (2001–03), or both. We included individuals from two age groups (children aged 6–7 years and adolescents aged 13–14 years) who self-completed written questionnaires at school. We estimated the 10-year rate of change in prevalence of current wheeze, severe asthma symptoms, ever having asthma, exercise wheeze, and night cough (defined by core questions in the questionnaire) for each centre, and we estimated trends across world regions and income levels using mixed-effects linear regression models with region and country income level as confounders. Overall, 119 795 participants from 27 centres in 14 countries were included: 74 361 adolescents (response rate 90%) and 45 434 children (response rate 79%). About one in ten individuals of both age groups had wheeze in the preceding year, of whom almost half had severe symptoms. Most centres showed a change in prevalence of 2 SE or more between ISAAC Phase III to GAN Phase I. Over the 27-year period (1993–2020), adolescents showed a significant decrease in percentage point prevalence per decade in severe asthma symptoms (–0·37, 95% CI –0·69 to –0·04) and an increase in ever having asthma (1·25, 0·67 to 1·83) and night cough (4·25, 3·06 to 5·44), which was also found in children (3·21, 1·80 to 4·62). The prevalence of current wheeze decreased in low-income countries (–1·37, –2·47 to –0·27], in children and –1·67, –2·70 to –0·64, in adolescents) and increased in lower-middle-income countries (1·99, 0·33 to 3·66, in children and 1·69, 0·13 to 3·25, in adolescents), but it was stable in upper-middle-income and high-income countries. Trends in prevalence and severity of asthma symptoms over the past three decades varied by age group, country income, region, and centre. The high worldwide burden of severe asthma symptoms would be mitigated by enabling access to effective therapies for asthma. more

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The Burden of Pediatric Asthma

Ferrante, G.; La Grutta, S. Frontiers in Pediatrics (2018) CC

Asthma is the most common chronic disease in children, imposing a consistent burden on health system. In recent years, prevalence of asthma symptoms became globally increased in children and adolescents, particularly in Low-Middle Income Countries (LMICs). Host (genetics, atopy) and environmental fa... more

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Prevalence, severity and risk factors for asthma in school-going adolescents in KwaZulu Natal, South Africa

Mphahlele, R.; Lesosky, M.; Masekela, R. BMJ Open Respiratory Research (2023) CC

Background Asthma remains highly prevalent, with more severe symptoms in low-income to middle-income countries (LMICs) compared with high-income countries. Identifying risk factors for severe asthma symptoms can assist with improving outcomes. We aimed to determine the prevalence, severity and ris... more

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Pediatric Asthma: A Global Epidemic

Serebrisky, D.; Wiznia, A. Annals of Global Health (2019) CC

The global prevalence, morbidity and mortality related to childhood asthma among children has increased significantly over the last 40 years. Although asthma is recognized as the most common chronic disease in children, issues of underdiagnosis and undertreatment persist. There are substantial globa... more

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The burden of asthma, hay fever and eczema in adults in 17 countries: GAN Phase I study

Mortimer, K.; Lesosky, M.; García-Marcos, L.; et al. (2022) CC2

Asthma, hay fever and eczema are three common chronic conditions. There have been no recent multi-country data on the burden of these three conditions in adults; the aims of this study are to fill this evidence gap. The Global Asthma Network Phase I is a multi-country cross-sectional population-bas... more

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Asthma management and control in children, adolescents, and adults in 25 countries: a Global Asthma Network Phase I cross-sectional study

García-Marcos, L.; Chiang, C. Y.; Asher, I.; et al. The Lancet Global Health Volume 11, Issue 2e218-e228February 2023 (2023) CC2

Asthma is one of the most common non-communicable diseases globally. This study aimed to assess asthma medicine use, management plan availability, and disease control in childhood, adolescence, and adulthood across different country settings.

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The Global Asthma Report 2022

Global Asthma Network (2022) CC2

The Global Asthma Report (GAR) 2022, prepared by the Global Asthma Network (GAN), is the fourth such report (others 2011, 2014, 2018). GAN builds upon the work of the International Study of Asthma and Allergies in Childhood (ISAAC) and The International Union Against Tuberculosis and Lung Disease (T... more

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Global Asthma Network survey suggests more national asthma strategies could reduce burden of asthma

Asher, I.; Haahtela, T.; Selroos, O.; et al. Science Direct (2017) CC2

Several countries or regions within countries have an effective national asthma strategy resulting in a reduction of the large burden of asthma to individuals and society. There has been no systematic appraisal of the extent of national asthma strategies in the world.

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2023 GINA Main Report, Global Strategy for Asthma Management and Prevention

Global Institute for Asthma (2023) CC2

The 2023 update of the Global Strategy for Asthma Management and Prevention incorporates new scientific information about asthma based on a review of recent scientific literature by an international panel of experts on the GINA Science Committee. This comprehensive and practical resource about one o... more

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The Global Asthma Network

Global Asthma Network (2024) CC2

Read about our flagship publication, The Global Asthma Report 2022, a 102-page cutting edge State-of-the-Art report, with contributions from 97 experts from, 31 countries. The theme for this year is "Asthma Education Empowers", and emphasizes the need to empower people with asthma with the approp... more

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Global Strategy for Asthma Management and Prevention (2019 update)

Global Initiative for Asthma (2019) CC2

The reader acknowledges that this report is intended as an evidence-based asthma management strategy, for the use of health professionals and policy-makers. It is based, to the best of our knowledge, on current best evidence and medical knowledge and practice at the date of publication. When assessi... more

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Proposed Strategies to Improve Adult Asthma Management in Egypt: Expert Review and Recommendations

Hosny, H.; Madkour, A.; Hantera, M.; et al. (2022) CC2

Several challenges face asthma management in Egypt, including the high percentage of uncontrolled patients, inadequate compliance, and overuse of short-acting beta-agonists (SABAs) leading to increased asthma-related morbidity and mortality. In this regard, the recent Global Initiative for Asthma (G... more

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The reality of managing asthma in sub-Saharan Africa – Priorities and strategies for improving care

Mortimer, K.; Masekela, R.; Ozoh, O.; et al. (2022) CC2

Asthma is the most common non-communicable disease in children and remains one of the most common throughout the life course. The great majority of the burden of this disease is seen in low-income and middle-income countries (LMICs), which have disproportionately high asthma-related mortality relati... more

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Asthma management in low and middle income countries: case for change

Mortimer, K.; Reddel, H. K.; Pitrez, P. M.; et al. (2022) CC2

Asthma is the most common noncommunicable disease in children, and among the most common in adults. According to the most recent estimates from the Global Asthma Network Phase I study, around one in 10 children and adults have symptoms of asthma and one in 20 school-aged children have severe asthma ... more

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Global surveillance, prevention and control of chronic respiratory diseases - a comprehensive approach

Bousquet, J.; Khaltaev, N. (2007) C_WHO

Chronic respiratory diseases, such as asthma and chronic obstructive pulmonary disease, kill more than four million people every year and affect hundreds of millions more. These diseases erode the health and well-being of the patients and have a negative impact on families and societies. Women ... more

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Global Strategy for Asthma Management and Prevention (2023 update)

Global Initiative for Asthma (2023) CC2

Asthma is a serious global health problem affecting all age groups. Its prevalence is increasing in many countries, espacially among children. Although some countries have seen a decline in hospitalizations and deaths from asthma, asthma still imposes an unacceptable burden on health care systems, a... more

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Improving the global diagnosis and management of asthma in children

Lenney, W.; Bush, A.; Fitzgerald, D.A. et al. BMJ Journals (2018) CC

Asthma is the most common chronic condition in children worldwide. It affects daytime activities, sleep and school attendance and causes anxiety to parents, families and other carers. The quality of asthma diagnosis and management globally still needs substantial improvement. From infancy to the tee... more

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The burden of severe asthma in sub-Saharan Africa: Findings from the African Severe Asthma Project

Kirenga, B.J.; Chakaya, J.; Yimer, G. et al. Journal of Allergy and Clinical Immunology: Global (2024) CC

Severe asthma is associated with high morbidity, mortality, and health care utilization, but its burden in Africa is unknown. This article wants to determine the burden (prevalence, mortality, and activity and work impairment) of severe asthma in 3 countries in East Africa: Uganda, Kenya, and Ethio... more