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Asthma

Asthma is a relatively common chronic inflammatory disease of the airways of the lungs, which results in symptoms such as episodes of wheezing, coughing, chest tightness and shortness of breath.  The NWHU monitors trends of mortality and hospitalization from asthma in the catchment area.


Hospitalization

From 2010 to 2014, hospitalization rates from asthma in the NWHU were not statistically different than in Ontario as a whole. Ontario had an average of 41.8 cases per 100,000 per year while the NWHU had 44.2 cases per 100,000 per year.

Females had slightly higher rates of hospitalization for asthma in comparison to males, an average of 49.9 cases per 100,000 per year vs 38.3 cases per 100,000 per year respectively (difference was not statistically significant). As well, hospitalization rates for asthma generally decreased with age where those between the ages of 0-19 had the highest rates, at 64.8 cases per 100,000 per year, while those ages 75 and older had the lowest rates at 15.7 cases per 100,000 per year. 
hospitalization rates for asthma

Source:  Public Health Ontario. Snapshots: Hospitalization for asthma 2010-2014. Toronto, ON: Ontario Agency for Health Protection and Promotion; 2016 Feb 1 [cited 2016 May 26]. Available from: http://www.publichealthontario.ca/en/DataAndAnalytics/Snapshots/Pages/Chronic-Disease-Hospitalization.aspx​


Age-standardized rates per 100,000 of asthma hospitalizations in the NWHU, by sex, 2010-2014

Age-standardized rate per 100,000​ ​ ​ ​ ​ ​ ​
Sex ​2010 ​2011 ​2012 ​2013 ​2014 ​Average
Males​ ​41.3 ​40.5 ​35.0 ​38.0 ​36.8 ​38.3
Females ​49.1 ​55.3 ​46.0 ​43.9 ​55.3 ​49.9
Source:  Public Health Ontario. Snapshots: Hospitalization for asthma 2010-2014. Toronto, ON: Ontario Agency for Health Protection and Promotion; 2016 Feb 1 [cited 2016 May 26]. Available from: http://www.publichealthontario.ca/en/DataAndAnalytics/Snapshots/Pages/Chronic-Disease-Hospitalization.aspx​ 
 

Hospitalization from ischaemic heart disease in the NWHU by age group, rates per 100,000, 2010-2014
​​​​​​​​ ​ ​ ​ ​ ​ ​​Age-specific rate per 100,000
​​Age 2010 ​2011 2012 2013 2014 2015
0-19 ​​​84.4 ​71.2 ​58.5 ​32.0 ​78.1 ​64.8
20-44 ​32.4 ​45.0 ​41.1 ​53.8 ​37.1 ​41.9
45-64 ​34.4 ​25.7 ​21.5 ​30.2 ​30.3 ​28.4
65-74 ​0.0 ​32.7 ​15.6 ​14.8 ​28.8 ​18.4
75+ ​20.1 ​19.7 ​19.4 ​19.3 ​0.0 ​15.7
 Source:  Public Health Ontario. Snapshots: Hospitalization for asthma 2010-2014. Toronto, ON: Ontario Agency for Health Protection and Promotion; 2016 Feb 1 [cited 2016 May 26]. Available from: http://www.publichealthontario.ca/en/DataAndAnalytics/Snapshots/Pages/Chronic-Disease-Hospitalization.aspx

Mortality

On average, mortality rates for asthma were relatively low and similar within the NWHU and the province during 2007-2011 (0.6 cases per 100,000 people vs 0.5, respectively). While Ontario experienced a gradual downward trend, the NWHU experienced greater fluctuation with sharp increases in 2008, 2010 and 2011.

Males were slightly more likely to experience death from asthma in comparison to females (1.6 cases per 100,000 people vs 1.2 respectively). As well, those ages 75 years and older were significantly more likely to experience death from asthma in comparison to any other age group (20.1 cases per 100,000 people).

 asthma mortality rates

Source:  Public Health Ontario. Snapshots: Mortality from asthma 2007-2011. Toronto, ON: Ontario Agency for Health Protection and Promotion; 2016 Feb 1 [cited 2016 June 24]. Available from: http://www.publichealthontario.ca/en/DataAndAnalytics/Snapshots/Pages/Chronic-Disease-Mortality.aspx