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. Author manuscript; available in PMC: 2008 Dec 1.
Published in final edited form as: Occup Environ Med. 2008 Jun 4;65(11):736–742. doi: 10.1136/oem.2007.035253

Table 4.

Effect of a 15 ppb increase in O3 on FVC and FEV1

O3 measure % Change in FVC 95% Confidence Interval p-value % Change in FEV1 95% Confidence Interval p-value
1 day mean −0.74 −1.29, −0.17 0.0104 −0.83 −1.43, −0.23 0.0071
2 day mean −1.29 −1.95, −0.63 0.0001 −1.25 −1.96, −0.54 0.0006
3 day mean −1.29 −2.02, −0.55 0.0006 −1.08 −1.86, −0.28 0.0081
4 day mean −1.02 −1.81, −0.21 0.0134 −0.63 −1.49, 0.23 0.1525
5 day mean −1.09 −1.96, −0.21 0.0153 −0.66 −1.61, 0.29 0.1709