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How does ethnicity affect asthma prevalence?

Date:
March 29, 2010
Source:
BioMed Central
Summary:
A study of UK schoolchildren has revealed that black Africans, Indians and Bangladeshis have a similar or lower prevalence of asthma than white children, while black Caribbean and mixed black Caribbean/white boys are more likely to have asthma. Researchers studied the occurrence of asthma, investigating ethnic differences in risk factors.

A study of UK schoolchildren has revealed that Black Africans, Indians and Bangladeshis have a similar or lower prevalence of asthma than White children, while Black Caribbean and Mixed Black Caribbean/White boys are more likely to have asthma. Researchers writing in the open access journal BMC Pediatrics studied the occurrence of asthma, investigating ethnic differences in risk factors.

Melissa Whitrow and Seeromanie Harding from the Social and Public Health Sciences Unit of the Medical Research Council, UK, used data taken from 51 London schools to investigate a random selection of 11-13 year old pupils. The final sample for analysis included 1219 children who identified themselves as 'White UK', 933 'Black Caribbean', 1095 'Black African', 459 'Indian', 215 'Pakistani', 392 'Bangladeshi' and 299 'Mixed White UK and Black Caribbean'.

According to Whitrow and Harding, "Social and environmental factors may influence risk of asthma through early life exposures regulating the allergic inflammatory response and/or later life exposures to allergens. A positive association between body mass index (BMI) and asthma has also been reported. We aimed to investigate the influence of these factors on ethnic differences in asthma prevalence."

The researchers found that a family history of asthma and psychological well-being were consistent correlates for asthma regardless of ethnicity. Less than six years of residence in the UK had an independent protective effect for Black Caribbeans and Black Africans, possibly reflecting continuing protection from early life exposures in their home countries. A gender difference was observed for Indians and Bangladeshis, with less asthma in girls than boys. Speaking about these results, the authors said, "These findings point to early protective influences which are not properly understood. International comparisons could provide useful insights into prevention of asthma, for ethnic minority children and for all children."


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Journal Reference:

  1. Melissa J Whitrow and Seeromanie Harding. Asthma in Black African, Black Caribbean and South Asian adolescents in the MRC DASH study: a cross sectional analysis. BMC Pediatrics, (in press) [link]

Cite This Page:

BioMed Central. "How does ethnicity affect asthma prevalence?." ScienceDaily. ScienceDaily, 29 March 2010. <www.sciencedaily.com/releases/2010/03/100324211149.htm>.
BioMed Central. (2010, March 29). How does ethnicity affect asthma prevalence?. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2010/03/100324211149.htm
BioMed Central. "How does ethnicity affect asthma prevalence?." ScienceDaily. www.sciencedaily.com/releases/2010/03/100324211149.htm (accessed September 17, 2014).

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