Table 3.

Lung function with ozone exposure

	0 ppb O3			100 ppb O3			200 ppb O3
Lung Function	0 h	4 h	24 h	0 h	4 h	24 h	0 h	4 h	24 h
FEV1, l	3.44 ± 0.78	3.42 ± 0.80	3.33 ± 0.80	3.32 ± 0.79	3.32 ± 0.83	3.27 ± 0.79	3.39 ± 0.80	3.22 ± 0.88	3.29 ± 0.77
FVC, l	4.42 ± 1.10	4.39 ± 1.10	4.34 ± 1.09	4.34 ± 1.08	4.31 ± 1.10	4.31 ± 1.10	4.39 ± 1.10	4.24 ± 1.15	4.32 ± 1.09
FEV1-to-FVC ratio	0.79 ± 0.11	0.79 ± 0.10	0.78 ± 0.10	0.78 ± 0.11	0.78 ± 0.91	0.77 ± 0.11	0.78 ± 0.10	0.77 ± 0.10	0.77 ± 0.11

Values are means ± SD. The time points include immediately before (0 h), immediately after (4 h), and 20 h after (24 h) the 4-h-long ozone exposure.