Table 2.

Crude and adjusted^* incidence rate ratios of pulmonary TB by ambient PM exposure concentrations in North Carolina.

		Crude IRR (95%CI)		Adjusted* IRR (95%CI)
PM10†	<19.05		Ref		Ref
(µg/m3)	19.06–21.08	1.20	(1.07, 1.34)	1.21	(0.97, 1.51)
	21.09–22.78	1.09	(0.97, 1.23)	0.96	(0.76, 1.20)
	22.79–24.92	1.17	(1.05, 1.31)	1.00	(0.79, 1.26)
	≥24.93	1.44	(1.30, 1.60)	1.22	(0.98, 1.52)
PM2.5‡	<11.94		Ref		Ref
(µg/m3)	11.95–12.91	1.38	(1.15, 1.66)	1.29	(0.97, 1.71)
	12.92–13.75	1.28	(1.09, 1.50)	1.27	(1.00, 1.62)
	13.76–14.68	1.13	(0.96, 1.32)	1.09	(0.86, 1.39)
	≥14.68	1.34	(1.14, 1.56)	1.06	(0.80, 1.40)

^†Analysis includes years 1993 – 2007;

^‡Analysis includes years 1999 – 2007;

^*Adjusted for age, gender, race, and year of diagnosis