Table 17: COPD Prevalence and Incidence in Ontario, 1996 to 2007^*.

Variable	Estimate	Source
Population in Ontario, Canada, in 2007 (aged ≥ 35 years)	7,082,086	Gershon et al (25)
Prevalence of COPD in Ontario, Canada, in 2007 (males and females aged ≥ 35 years)	708,743	Gershon et al (25)
Relative increase in prevalence from 1996 to 2007	23%	Gershon et al (25)
Incidence of COPD in Ontario, Canada, in 2007 (males and females aged ≥ 35 years)	60,198	Gershon et al (25)
Relative decrease in incidence from 1996 to 2007	28%	Gershon et al (25)
Very severe COPD	18%	ICES†
Severe COPD	21%	ICES†
Moderate COPD	60%	ICES†

^*Abbreviations: COPD, chronic obstructive pulmonary disease; ICES, Institute of Clinical Evaluative Sciences.

^†Personal communication, ICES, January 2011.