Table 4.

Relative odds of STEMI associated with interquartile range (IQR) increases in mean pollutant concentrations, by lagged averaging time. All models adjusted for 3-hour temperature and relative humidity.

	Time lag	IQR	N	Events	Odds ratio (95% CI)
Delta-C (μg/m3)	1 hr	0.129	274	277	0.99 (0.92-1.07)
	12 hrs	0.132	275	278	0.97 (0.87-1.08)
	24 hrs	0.134	275	278	0.97 (0.85-1.10)
	48 hrs	0.138	268	271	1.03 (0.87-1.22)
	72 hrs	0.137	264	267	1.00 (0.83-1.22)
Black carbon (μg/m3)	1 hr	0.531	336	339	1.00 (0.85-1.17)
	12 hrs	0.477	337	340	1.02 (0.85-1.22)
	24 hrs	0.435	337	340	1.07 (0.88-1.30)
	48 hrs	0.374	330	333	1.07 (0.87-1.31)
	72 hrs	0.333	326	329	0.96 (0.78-1.17)
Fine particles (PM2.5; μg/m3)	1 hr	7.10	334	339	1.17 (0.99-1.39)
	12 hrs	6.37	330	340	1.11 (0.93-1.33)
	24 hrs	6.03	327	340	1.17 (0.96-1.41)
	48 hrs	5.53	331	333	1.10 (0.91-1.34)
	72 hrs	5.12	324	329	0.98 (0.80-1.21)
Nitrogen dioxide (ppb)	1 hr	6.90	65	66	0.86 (0.62-1.20)
	12 hrs	5.67	58	59	1.01 (0.72-1.42)
	24 hrs	4.76	61	62	0.97 (0.68-1.36)
	48 hrs	4.25	62	63	1.04 (0.71-1.52)
	72 hrs	3.81	59	60	1.08 (0.71-1.65)
Sulfur dioxide (ppb)	1 hr	0.002	347	351	0.94 (0.90-0.99)
	12 hrs	0.002	343	347	0.95 (0.89-1.01)
	24 hrs	0.002	349	353	0.95 (0.89-1.02)
	48 hrs	0.002	349	353	0.93 (0.87-1.00)
	72 hrs	0.002	347	351	0.93 (0.86-1.00)
Ozone (ppb)	1 hr	19.9	345	349	1.27 (1.00-1.63)
	12 hrs	15.7	342	346	1.20 (0.95-1.51)
	24 hrs	13.5	348	352	1.14 (0.91-1.44)
	48 hrs	12.6	347	351	1.09 (0.84-1.41)
	72 hrs	12.2	345	349	1.17 (0.87-1.57)
Carbon monoxide (ppm)	1 hr	0.223	336	340	1.14 (0.92-1.40)
	12 hrs	0.230	334	338	1.19 (0.93-1.51)
	24 hrs	0.221	339	343	1.15 (0.90-1.48)
	48 hrs	0.222	341	345	1.32 (1.00-1.73)
	72 hrs	0.221	339	343	1.25 (0.94-1.68)