Study Examines Dog Traits and Childhood Asthma Risk

Understanding Asthma in Children

A recent study published in Scientific Reports investigated the influence of various dog traits on the risk of asthma in children. Asthma is characterized by shortness of breath due to the inflammation and constriction of airways. Symptoms often manifest during childhood, with previous research indicating that exposure to pets may exacerbate these symptoms. Conversely, some studies suggest that increased exposure to dogs at a young age might reduce the likelihood of developing asthma.

Research Methodology

Considering the diverse characteristics of dogs and their living environments, the Swedish study aimed to determine the effects of different dog traits on children’s asthma risk. The research analyzed data from children born in Sweden between January 1, 2001, and December 31, 2004, who lived in households with dogs. Additionally, to assess sensitivity, data were collected from children born between July 1, 2005, and December 31, 2010. These children were monitored from one year of age until they experienced an initial asthma diagnosis, death, emigration, or until December 31, 2011. The study took into account factors such as dog size, breed, sex, and the number of dogs in each household, with a specific focus on hypoallergenic breeds.

Key Findings: Dog Exposure and Asthma Risk

The results indicated that children exposed to female dogs had a lower risk of asthma at six years old compared to those who were around male dogs. Furthermore, the number of dogs present in a household significantly influenced asthma risk. Children living with more than one dog had a reduced risk of asthma compared to those with a single dog.

Hypoallergenic Dogs and Allergies

Interestingly, no significant correlation was found between dog size and asthma risk. Exposure to companion and toy breeds was linked to a higher risk of asthma by age six, while contact with sheepdogs and cattle dogs was associated with a lower risk. Although hypoallergenic breeds were frequently found in households with allergic parents, they did not show a connection to asthma in the children by age six.

Future Research Directions

This preliminary study presents compelling insights into the relationship between pet exposure and childhood asthma development. While the findings suggest a notable decrease in asthma risk for children exposed to female dogs, further research is necessary to confirm these results. Future studies should also consider additional factors, such as the duration of contact with dogs and the influence of other pets within the household.

References

Fall, T., Ekberg, S., Lundholm, C., Fang, F., & Almqvist, C. (2018). Dog characteristics and future risk of asthma in children growing up with dogs. Scientific Reports, 8(1). doi:10.1038/s41598-018-35245-2
Karolinskainst. (n.d.). No link between ‘hypoallergenic’ dogs and lower risk of childhood asthma. Retrieved from https://www.eurekalert.org/pub_releases/2018-11/ki-nlb111518.php