Table 1. Patient characteristics.

Characteristic	N=30	%
Gender
Male	17	56.7
Female	13	43.3
Age
Median	60
Range	37–84
Smoker
Never	18	60
Ever	12	40
Histology
Adenocarcinoma	30	100
Tumor cell % (pleura effusion specimen)
1–5	7	23.3
6–10	10	33.3
11–15	5	16.7
16–20	8	26.7