. Author manuscript; available in PMC: 2016 Feb 3.

Published in final edited form as: J Expo Sci Environ Epidemiol. 2014 Jul 9;25(5):532–542. doi: 10.1038/jes.2014.45

Table 2.

Rate of change of Ozone from 1999–2010

	Cluster 1		Cluster 2		Cluster 3		Cluster 4		Cluster 5		Overall
Quantile	Change per year (ppb/year)	Standard Error	Change per year (ppb/year)	Standard Error	Change per year (ppb/year)	Standard Error	Change per year (ppb/year)	Standard Error	Change per year (ppb/year)	Standard Error	Change per year (ppb/year)	Standard Error
0.05	0.36	0.07	0.38	0.07	0.31	0.11	0.10	0.11	0.24	0.10	0.27	0.03
0.25	0.28	0.05	0.25	0.05	0.26	0.07	−0.02	0.11	0.21	0.06	0.24	0.03
0.5	0.30	0.04	0.23	0.05	0.09	0.05	−0.06	0.10	0.11	0.08	0.18	0.03
0.75	0.28	0.04	0.11	0.07	0.07	0.05	−0.28	0.12	0.18	0.08	0.11	0.03
0.95	0.23	0.07	−0.08	0.10	−0.15	0.08	−0.69	0.25	0.42	0.14	0.02	0.05

Grey entries are not statistically different than 0 (p>=0.05)