Table 2.

Effect estimates used in ozone health burden analysis

Health effect	Outcome definitions	Age group	Exposure metric	Effect estimate	Study location	Source of effect estimate
Premature mortality	Cause specific mortality ICD-9: 390–448, 490–496, 487, 480–486, 507	All ages	Daily 24-h average	2.33 % Increase in cardiovascular and respiratory mortality per 10 ppb increase in ozone levels over the previous week	New York City	Huang et al. (2005)
Emergency department visits—asthma	ICD-9:493	All ages	Daily 8-h maximum	Relative risk of 1.32 per 53.5 ppb increase in ozone	New York City	Ito et al. (2007)
Hospital admissions—asthma	ICD-9:493, cases listed as “emergency” or “urgent”	All ages	Daily 8-h maximum	Relative risk of 1.06–1.20 (varies by age group) per 22 ppb increase in ozone	New York City	Silverman and Ito (2010)