. Author manuscript; available in PMC: 2013 Apr 29.

Published in final edited form as: Arch Intern Med. 2012 Feb 13;172(3):229–234. doi: 10.1001/archinternmed.2011.732

Table 3.

Odds ratio of ischemic stroke onset per interquartile range increase in PM_2.5 levels 0–24 hours prior to stroke symptom onset among subgroups of patients.

Subgroup		OR (95% CI)	P_h
Presumed Stroke Etiology	Large Artery	1.24 (1.04,1.48)	0.19
	Small Vessel	1.19 (1.02,1.37)
	Cardioembolic	1.09 (0.93,1.27)
	Other/Undetermined	0.99 (0.85,1.15)
History of Diabetes	Yes	1.10 (1.00,1.21)	0.67
	No	1.14 (0.99,1.31)
History of Atrial Fibrillation	Yes	1.11 (1.02,1.22)	0.92
	No	1.13 (0.96,1.32)
History of Hypertension	Yes	1.10 (0.96,1.27)	0.86
	No	1.12 (1.02,1.23)
History of Stroke	Yes	1.12 (1.02,1.23)	0.80
	No	1.09 (0.95,1.26)
Age	≥75 years	1.17 (1.05, 1.31)	0.23
	<75 years	1.06 (0.96, 1.19)