Table 1

Characteristics of study patients

Patient no	Age (years)	Sex	Baseline FEV₁ (l)	Baseline FEV₁ (% pred)	Histamine PC₂₀ (mg/ml)
*Geometric mean and range presented for PC₂₀ histamine values. †SD for log₁₀PC₂₀.
1	42	F	2.40	71	0.76
2	27	F	3.43	106	2.95
3	21	F	3.45	87	6.41
4	43	F	2.05	87	6.35
5	21	F	2.50	75	6.58
6	19	F	3.95	112	4.42
7	22	M	3.00	71	1.30
8	22	F	2.99	91	0.90
9	24	F	3.70	93	0.29
10	22	F	2.86	91	1.62
11	20	M	4.65	94	0.40
12	22	M	4.20	93	0.67
13	21	M	3.55	76	2.16
14	20	M	4.30	95	8.82
15	22	M	3.03	113	3.03
16	38	F	4.60	102	5.97
17	22	M	4.50	91	0.63
18	41	F	2.50	95	4.00
Mean	26.1		3.4	91.3	2.0*
SD	8.4		0.8	12.4	0.4†
Range	19–43		2.05–4.65	71–113	0.29–8.82