Table 1. Patient Demographics.

Factor	Frequency (percent)
Gender
M	564 (48.4%)
F	602 (51.6%)
Recurrence
No	997 (85.5%)
Yes	169 (14.5%)
Histology
Adenocarcinoma	645 (55.3%)
Squamous cell carcinoma	281 (24.1%)
Other Non-small cell	240 (20.6%)
Zubrod Performance status
Normal activity	627 (53.8%)
Symptoms, but nearly fully ambulatory	524 (44.9%)
Some bed time, but needs to be in bed < 50% of normal day	15 (1.3%)
Pleural Invasion
No	952 (81.6%)
Yes	214 (18.4%)
Tumor Size (pathologic)
T1a	418 (35.8%)
T1b	328 (28.1%)
T2a	267 (22.9%)
T2b	102 (8.7%)
T3	51 (4.4%)