Table 2.

Percent increases for 10 ppb increase in ozone by season, month, and age groups.

	%	95% C.I.
by season
Winter	-0.13	-0.56	0.29
Spring	0.35	0.16	0.54
Summer	0.50	0.38	0.62
Autumn	0.05	-0.14	0.24
by month
May	0.48	0.28	0.68
June	0.46	0.24	0.68
July	0.65	0.47	0.82
August	0.28	0.11	0.46
September	-0.09	-0.35	0.16
by age group
0–20	0.08	-0.42	0.57
21–30	0.10	-0.67	0.87
31–40	0.07	-0.38	0.52
41–50	0.08	-0.27	0.43
51–60	0.54	0.19	0.89
61–70	0.38	0.16	0.61
71–80	0.50	0.32	0.67
> 80	0.29	0.13	0.44