Table 1

Characteristics of study subjects

No.	Age	Sex	Smoking	VC (l)	FEV₁ (l)	%TLC (%)	%Tlco (%)	Cst (l/cmH₂O)	NO (ppb)	Medication
NO=nitric oxide; iNOS=inducible NO synthase; NT=nitrotyrosine; Ex=ex-smoker; ND=not done; T=theophylline; AC=anticholinergic agents; B=β adrenoceptor agonists; VC=vital capacity; FEV₁=forced expiratory volume in 1 second; TLC=total lung capacity; Tlco=carbon monoxide transfer factor; Cst=static compliance; NO=nitric oxide.
Steroid treatment group
1	49	M	Ex	3.97	1.43	131	36.5	0.47	16	T, AC
2	70	M	Ex	1.53	0.68	143	35.0	0.33	10	T, AC, B
3	72	M	Ex	1.66	0.79	123	26.2	0.36	13	T, AC
4	53	M	Ex	3.85	1.46	120	45.2	0.50	10	T
5	71	M	Ex	2.88	0.85	124	36.9	0.34	15	T, AC, B
6	75	M	Ex	2.79	0.69	112	45.5	0.32	14	T
7	71	M	Ex	2.99	1.05	107	52.4	0.46	18	T, AC, B
8	69	M	Ex	3.17	1.02	149	39.2	0.49	8	T, B
9	69	M	Ex	2.33	1.22	120	51.7	0.31	9	T
10	64	M	Ex	3.25	1.33	N.D.	N.D.	0.35	7	T, AC
11	67	F	Ex	2.50	1.45	109	53.0	N.D.	30	T
12	69	M	Ex	3.23	1.07	123	60.3	N.D.	14	T, AC
Mean	66.6			2.85	1.09	125	41.0	0.39	13.7
SE	2.4			0.23	0.09	4.2	3.2	0.03	1.9

Placebo treatment group
13	65	M	Ex	2.49	0.66	146	45.2	0.45	26	T, AC, B
14	65	M	Ex	4.24	1.97	122	40.4	0.32	5	T, AC, B
15	76	M	Ex	2.54	1.75	124	46.5	0.33	11	T, AC
16	65	F	Ex	2.96	1.70	104	52.9	0.29	17	T, B
17	69	M	Ex	3.35	1.09	131	38.4	0.42	11	T, AC, B
18	65	M	Ex	2.99	1.35	130	28.9	0.46	5	T, AC, B
Mean	67.5			3.10	1.42	126	42.1	0.38	12.5
SE	2.0			0.29	0.22	6.1	3.7	0.03	3.6