Table 4

Late asthmatic response

Subject	Air			100 µg·m⁻³ H₂SO₄			1000 µg·m⁻³ H₂SO₄
Subject	Baseline FEV₁	Minimum FEV₁	% change	Baseline FEV₁	Minimum FEV₁	% change	Baseline FEV₁	Minimum FEV₁	% change
1	1.94	1.78	−8.25	2.10	1.92	−8.57	2.05	1.78	−13.17
2	2.80	2.48	−11.43	2.82	2.42	−14.18	2.86	2.51	−12.24
4	2.85	2.85	0.00	2.97	2.87	−3.37	3.11	3.11	0.00
5	2.79	2.63	−5.73	2.37	2.37	0.00	2.45	2.45	0.00
6	3.31	2.88	−12.99	3.24	3.02	−6.79	3.30	2.80	−15.15
7	2.81	2.81	0.00	2.75	2.62	−4.73	2.78	2.78	0.00
8	3.96	3.96	0.00	3.81	3.81	0.00	4.12	4.02	−2.43
10	2.81	2.64	−6.05	2.76	2.61	−5.43	2.64	2.47	−6.44
11	3.01	2.88	−4.32	2.93	2.93	0.00	2.89	2.78	−3.81
13	3.62	3.22	−11.05	3.55	3.14	−11.55	3.67	3.18	−13.35
Mean	2.99	2.81	−6.0	2.93	2.77	−5.5	2.99	2.79	−6.7

H₂SO₄: sulphuric acid
FEV₁: forced expiratory volume in one second
There were no significant differences in the late asthmatic responses between exposures