Table 1

Patient characteristics

Patient No.	Age yrs	Sex	Smoking	Cumulative cigarette consumption pack-yrs	Date of WLL
1	35	M	Previous	15	1990
2	26	M	No	0	1993
3	46	F	No	0	1990, 1992, 1993, 1994
4	44	M	Previous	40	1993, 1995
5	43	M	Previous	23	1993, 1995
6	56	M	No	0	1995
7	36	M	Yes	40	1995
8	46	M	Previous	65	1995
9	30	F	Previous	10	1996
10	35	M	Yes	30	1998
11	18	F	No	0	1998
12	38	M	Previous	34	1999
13	63	M	No	0	2001
14	60	M	Previous	4.5	2001
15	34	M	Yes	7.5	2001
16	46	F	Previous	20	2001
17	17	M	No	0	2001
18	23	M	No	0	2002
19	46	M	Previous	75	2002
20	47	M	Previous	40	2002
21	71	M	Previous	137	2002

WLL: whole lung lavage
M: male
F: female