Table 5.

Comparisons of percent changes in PEF during and post-exposure in the transport hub and the park

Time points	Transport hub		Park		P value
	Mean	95 % CI	Mean	95 % CI
During exposure 1 h	−4.51	−5.66, −3.36	−1.91	−3.01, −0.81	0.03*
During exposure 2 h	−5.29	−6.44, −3.87	−2.41	−3.84, −0.98	0.02*
Post-exposure 5 h	−2.42	−4.17, −0.67	−2.08	−3.62, −0.54	0.08
Post-exposure 7 h	−1.63	−3.59, 0.33	−1.76	−3.72, 0.20	0.32
Post-exposure 9 h	−3.02	−5.03, −1.02	−2.87	−4.50, −1.24	0.24
Post-exposure 22 h	−3.23	−5.23, −1.23	−2.82	−4.73, −0.91	0.36

95 % CI 95 % confidence intervals

* P < 0.05