Table 1.

Respiratory symptom intensity scores pre/post 1-hour beach walk.

	n	Pre-exposure ± standard deviation	Post-exposure ± standard deviation	Difference	p Value*
All Participants
Exposure	97	1.91 ± 2.02	3.01 ± 3.02	1.10	0.001
Non-Exposure	97	1.98 ± 2.49	1.84 ± 2.29	−0.14	0.62
Between exposed and non-exposed					0.003
Place of Residence
Exposure coastal	30	1.93 ± 1.87	3.77 ± 3.69	1.84	0.02
Exposure inland	67	1.90 ± 2.10	2.67 ± 2.63	0.77	0.02
Non-exposure coastal	30	1.67 ± 2.40	1.30 ± 1.90	−0.37	0.55
Non-exposure inland	67	2.12 ± 2.53	2.07 ± 2.43	−0.05	0.89
Pre-treatmentmedication
Exposure meds	51	2.37 ± 2.15	3.04 ± 2.66	0.67	0.07
Exposure no meds	46	1.39 ± 1.74	2.98 ± 3.41	1.59	0.006
Non-exposure meds	51	2.45 ± 2.59	2.35 ± 2.70	−0.10	0.81
Non-exposure no meds	46	1.46 ± 2.29	1.26 ± 1.57	−0.20	0.64

^*two-tailed t-test.