TABLE 5.

HAZARD RATIOS FOR MORTALITY AND FOR INCIDENT MYOCARDIAL INFARCTION AND STROKE IN THE CALIFORNIA TEACHERS STUDY COHORT, BASED ON SUMMER OZONE INTERQUARTILE RANGES (1996–2005)

Outcome	No. of Events	n	IQR (ppb)	HR* (95% CI)
All-cause mortality	7,381	101,784	22.96	0.97 (0.94, 1.01)
Cardiovascular mortality	2,919	101,784	22.96	1.02 (0.96, 1.07)
NM respiratory mortality	702	101,784	22.96	1.09 (0.97, 1.21)
Lung cancer mortality	433	101,784	22.96	0.95 (0.82, 1.10)
IHD mortality	1,358	101,784	22.96	1.09 (1.01, 1.19)
Cerebrovascular mortality	728	101,784	22.96	0.99 (0.88, 1.10)
MI incidence	1,317	100,340	22.95	1.04 (0.96, 1.12)
Stroke incidence	1,875	100,223	22.94	1.02 (0.95, 1.09)

Definition of abbreviations: CI = confidence interval; HR = hazard ratio; IHD = ischemic heart disease; IQR = interquartile range; MI = myocardial infarction; NM = nonmalignant.

^*Models adjusted for age, race, smoking status, total pack-years, body mass index, marital status, alcohol consumption, second-hand smoke exposure at home, dietary fat, dietary fiber, dietary calories, physical activity, menopausal status, hormone therapy use, family history of MI or stroke, blood pressure medication, and aspirin use, and for contextual variables (income, income inequality, education, population size, racial composition, and unemployment). Exposure period, June 1996–December 2005; cohort follow-up period, June1997–December 2005.