Table 6.

Relative odds of a STEMI associated with interquartile range¹ increases in Delta-C, black carbon, and PM_2/5 concentrations in the previous hour, stratified by demographic and clinical characteristics. All models adjusted for 3-hour temperature and relative humidity.

	1-hour Delta-C			1-hour black carbon			1-hour ozone
	Events	Odds ratio (95% CI)	interaction p-value	Events	Odds ratio (95% CI)	interaction p-value	Events	Odds ratio (95% CI)	interaction p-value
Age
< 65 yrs	172	1.00 (0.91-1.10)	0.80	204	1.09 (0.89-1.33)	0.22	207	1.23 (0.90-1.68)	0.96
≥ 65 yrs	105	0.98 (0.86-1.10)		135	0.86 (0.67-1.12)		142	1.36 0.92-2.01)
Sex
Male	192	1.01 (0.93-1.09)	0.55	233	0.99 (0.83-1.19)	0.89	238	1.31 (0.98-1.76)	0.97
Female	85	0.95 (0.80-1.13)		106	1.00 (0.73-1.37)		111	1.20 (0.76-1.87)
Race
White2	184	0.98 (0.89-1.07)	0.17	235	0.95 (0.78-1.16)	0.88	242	1.29 (0.95-1.74)	0.61
Other	80	1.14 (0.93-1.40)		91	1.01 (0.73-1.39)		92	1.34 (0.86-2.09)
Smoker
Yes	129	0.99 (0.89-1.10)	0.95	152	1.08 (0.87-1.33)	0.33	152	1.12 (0.78-1.60)	0.47
No	137	0.99 (0.89-1.11)		176	0.87 (0.68-1.14)		186	1.52 (1.06-2.17)
Prior MI
Yes	50	0.90 (0.72-1.14)	0.27	54	0.88 (0.60-1.29)	0.71	59	1.78 (0.97-3.28)	0.49
No	224	1.02 (0.94-1.11)		282	1.02 (0.86-1.22)		287	1.20 (0.92-1.58)
Prior CVD
Yes	61	0.94 (0.80-1.11)	0.51	73	0.86 (0.61-1.22)	0.48	79	1.72 (1.02-2.90)	0.44
No	158	1.00 (0.88-1.15)		158	1.12 (0.87-1.45)		162	1.15 (0.81-1.64)
Diabetes
Yes	42	0.99 (0.80-1.22)	0.89	55	0.99 (0.66-1.49)	0.63	60	1.12 (0.63-2.00)	0.63
No	207	1.00 (0.92-1.08)		256	1.03 (0.86-1.23)		258	1.30 (0.97-1.73)
Hypertension
Yes	195	0.98 (0.90-1.08)	0.82	238	1.05 (0.87-1.26)	0.24	245	1.34 (1.00-1.90)	0.60
No	77	1.00 (0.87-1.15)		96	0.81 (0.57-1.17)		99	1.26 (0.78-2.03)
Dyslipidemia
Yes	172	0.94 (0.84-1.07)	0.89	203	1.05 (0.85-1.27)	0.63	203	1.23 (0.89-1.72)	0.63
No	102	1.03 (0.93-1.14)		133	0.92 (0.71-1.19)		143	1.35 (0.93-1.96)

¹Interquartile ranges: Delta-C = 0.129 μg/m³; black carbon = 0.531 μg/m³; ozone = 19.9 ppb

²Non-Hispanic