Asthma prevalence in Melbourne schoolchildren: have we reached the peak?

Robertson, Colin F.; Roberts, Mary Flynn; Kappers, Johanna

doi:10.5694/j.1326-5377.2004.tb05924.x

Cited by 138 publications

(86 citation statements)

References 12 publications

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“…This trend was also observed in the health survey for England between 1996 and 2001 2. Over the same period a similar fall in symptoms of asthma in 6-7 year old children reported by parents was seen in Melbourne 3. On the other hand, the only available repeat survey of preschool children noted a major increase in prevalence between 1990 and 1998 4.…”

supporting

confidence: 60%

Prevalence of asthma

Anderson

2005

BMJ

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supporting

confidence: 60%

Prevalence of asthma

Anderson

2005

BMJ

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“…28 Furthermore, it does not seem apparent that the English language countries have become ''less hygienic'' in recent decades, although increases in infant and childhood infections could have occurred due to specific factors such as increased use of childcare facilities. 29 The hygiene hypothesis is also unlikely to explain the considerably higher prevalences in many Latin American countries than in Spain and Portugal which are more consistent with changes in environmental exposures other than hygiene. [30][31][32] Other ''established'' asthma risk factors do not appear to explain the worldwide asthma prevalence patterns [33][34][35][36][37][38][39][40][41][42] or time trends, particularly the decline in English language countries.…”

Section: Discussionmentioning

confidence: 98%

Worldwide trends in the prevalence of asthma symptoms: phase III of the International Study of Asthma and Allergies in Childhood (ISAAC)

Pearce

Aït-Khaled

Beasley

et al. 2007

Thorax

1,082

803

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Background: Phase I of the International Study of Asthma and Allergies in Childhood (ISAAC) was designed to allow worldwide comparisons of the prevalence of asthma symptoms. In phase III the phase I survey was repeated in order to assess changes over time. Methods: The phase I survey was repeated after an interval of 5-10 years in 106 centres in 56 countries in children aged 13-14 years (n = 304 679) and in 66 centres in 37 countries in children aged 6-7 years (n = 193 404). Results: The mean symptom prevalence of current wheeze in the last 12 months changed slightly from 13.2% to 13.7% in the 13-14 year age group (mean increase of 0.06% per year) and from 11.1% to 11.6% in the 6-7 year age group (mean increase of 0.13% per year). There was also little change in the mean symptom prevalence of severe asthma or the symptom prevalence measured with the asthma video questionnaire. However, the time trends in asthma symptom prevalence showed different regional patterns. In Western Europe, current wheeze decreased by 0.07% per year in children aged 13-14 years but increased by 0.20% per year in children aged 6-7 years. The corresponding findings per year for the other regions in children aged 13-14 years and 6-7 years, respectively, were: Oceania (20.39% and 20.21%); Latin America (+0.32% and +0.07%); Northern and Eastern Europe (+0.26% and +0.05%); Africa (+0.16% and +0.10%); North America (+0.12% and +0.32%); Eastern Mediterranean (20.10% and +0.79%); Asia-Pacific (+0.07% and 20.06%); and the Indian subcontinent (+0.02% and +0.06%). There was a particularly marked reduction in current asthma symptom prevalence in English language countries (20.51% and 20.09%). Similar patterns were observed for symptoms of severe asthma. However, the percentage of children reported to have had asthma at some time in their lives increased by 0.28% per year in the 13-14 year age group and by 0.18% per year in the 6-7 year age group. Conclusions: These findings indicate that international differences in asthma symptom prevalence have reduced, particularly in the 13-14 year age group, with decreases in prevalence in English speaking countries and Western Europe and increases in prevalence in regions where prevalence was previously low. Although there was little change in the overall prevalence of current wheeze, the percentage of children reported to have had asthma increased significantly, possibly reflecting greater awareness of this condition and/or changes in diagnostic practice. The increases in asthma symptom prevalence in Africa, Latin America and parts of Asia indicate that the global burden of asthma is continuing to rise, but the global prevalence differences are lessening.

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“…Although much has been discovered in terms of the condition’s pathological physiology, its prevalence has been on a steady rise over the last 20 years [1]. Also, the number of patients with severe asthma as well as the number of patients who experience acute exacerbation such as status asthmaticus, are also on the increase.…”

Section: Introductionmentioning

confidence: 99%

Are children with asthma in South Korea also associated with vitamin D deficiency?

Kim

Seo

Yoo

et al. 2017

Environ Health Toxicol

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Recently, epidemiologic studies have shown that the lack of serum vitamin D levels may be associated with high asthma prevalence, but its effect is still controversial, depending on season, area, and food consumption. We aimed to examine the association of serum vitamin D levels with the prevalence of pediatric asthma in Korea. A total of 80 children (50 asthmatic children and 30 healthy controls) aged 6-14 years were participated in this study. Serum vitamin D levels were measured and compared between the two groups. Moreover, the relationship of serum vitamin D levels with results of pulmonary function test and environmental factors (lifestyle habits and residential factors) collected by a questionnaire survey were examined in asthmatic patients. Serum vitamin D levels in asthmatic children (16.63±4.20 ng/mL) were significantly lower than that in healthy controls (24.24±6.76 ng/mL) (p<0.05). Also, we found that the prevalence of asthma increase to 0.79-fold (odds ratio, 0.79; 95% confidence interval, 0.71 to 0.88; p<0.001) as serum vitamin D level is 1 ng/mL decreases. The increased time spent in outdoor could affect the increases of serum vitamin D levels significantly. However, no associations of serum vitamin D with pulmonary function and residential environmental factors (i.e., housing type, living floor, and indoor activity time) were observed. Our findings suggest that serum vitamin D levels were also associated with pediatric asthma in Korea. Moreover, management of serum vitamin D level in asthmatic children would be a promising approach for preventing exaggeration of their severity.

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Asthma prevalence in Melbourne schoolchildren: have we reached the peak?

Cited by 138 publications

References 12 publications

Prevalence of asthma

Prevalence of asthma

Worldwide trends in the prevalence of asthma symptoms: phase III of the International Study of Asthma and Allergies in Childhood (ISAAC)

Are children with asthma in South Korea also associated with vitamin D deficiency?

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