"Change in percentage of deaths attributable to short-term exposure to ground-level ozone by region, Canada, 1990 to 2015",,,,,, ,,,,,, Years (7-year periods),"Risk of deaths attributable to ground-level ozone (percentage) ",Change in percentage of deaths attributable to ground-level ozone (change from first 7-year period),"Risk of deaths attributable to ground-level ozone (percentage) ",Change in percentage of deaths attributable to ground-level ozone (change from first 7-year period),"Risk of deaths attributable to ground-level ozone (percentage) ",Change in percentage of deaths attributable to ground-level ozone (change from first 7-year period) Region,Eastern Canada,Eastern Canada,Central Canada,Central Canada,Western Canada,Western Canada 1990-1996,3.86,0,1.31,0,4.32,0 1991-1997,5.45,1.6,2.81,1.51,1.65,-2.67 1992-1998,5.84,1.98,2.56,1.25,-1.04[A],-5.36 1993-1999,5.04,1.18,3.37,2.06,-1.61[A],-5.93 1994-2000,5.11,1.25,3.56,2.25,-2.94[A],-7.26 1995-2001,3.54,-0.32,3.5,2.19,-4.33[A],-8.65 1996-2002,4.08,0.23,3.17,1.86,-2.72[A],-7.04 1997-2003,4.04,0.18,2.35,1.04,-2.63[A],-6.95 1998-2004,4.21,0.36,2.05,0.74,-0.42[A],-4.74 1999-2005,3.16,-0.7,1.85,0.54,1.11,-3.21 2000-2006,1.37,-2.49,1.81,0.5,1.28,-3.04 2001-2007,-0.07[A],-3.92,2.6,1.29,0.14,-4.18 2002-2008,0.35,-3.51,2.4,1.1,-0.98[A],-5.3 2003-2009,0.26,-3.59,2.25,0.94,-0.43[A],-4.75 2004-2010,0.22,-3.64,1.58,0.27,0.03,-4.29 2005-2011,0.84,-3.01,1.56,0.26,2.17,-2.15 2006-2012,-0.27[A],-4.13,0.82,-0.49,1.99,-2.33 2007-2013,0.13,-3.73,1.07,-0.24,1.75,-2.57 2008-2014,-1.13[A],-4.99,-0.16[A],-1.47,1.7,-2.62 2009-2015,-0.87[A],-4.73,0.6,-0.71,2.33,-2 ,,,,,, "Note: [A] It is not uncommon and expected for epidemiologic studies on the impacts of air pollution on health to produce negative estimates for some periods either by chance or due to background change. The indicator reports estimates of the percentage of deaths attributable to short-term exposure to O3 over 7-year periods and shows differences in the estimates relative to the respective reference period (first 7-year period). A total of 84 communities were analyzed for the regional indicator for O3, covering 78% of the Canadian population. The Eastern Canada (Newfoundland and Labrador, Nova Scotia, New Brunswick, and Quebec) region is composed of 32 communities (covering 18% of the Canadian population); Central Canada (Ontario) has 31 communities (covering 35% of the Canadian population); and Western Canada (Manitoba, Saskatchewan, Alberta, and British Columbia) has 21 communities (covering 25% of the Canadian population). In order to determine trends, 7-year periods were used to avoid abnormally high or low estimates due to data availability. For more information, please consult the Methods section (www.canada.ca/en/environment-climate-change/services/environmental-indicators/air-health-trends.html#methods). ",,,,,, "Source: Health Canada (2022) Environmental Health Science and Research Bureau, Population Studies Division.",,,,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,,,