Table 1.

Patient characteristics and demographics

Variable	Number
Gender: n = 723 patients
Male	349 (48 %)
Female	374 (52 %)
Median age in years (range)	76 (41–95)
Median weight in lbs (range)	160 (60–330)
Median Karnofsky performance score (range)	80 (40–100)
Median VAS Pain Score (range)	0 (0–9)
Current or previous smoker	630 (87 %)
Median smoker pack/years (range)	50 (1–545)
Race/ethnicity
Caucasian	634 (88 %)
Black/African American	42 (6 %)
Hispanic	5 (0.7 %)
Other	2 (0.3 %)
Unknown	39 (5 %)
Medically inoperable	374 (52 %)
Surgically inoperable	111 (15 %)
Prior Treatment(s): n = 741 lesions
None	622 (84 %)
Chemotherapy	69 (9 %)
Surgery	17 (2 %)
External beam radiation	9 (1 %)
Radiosurgery	3 (0.4 %)
Radiofrequency ablation	3 (0.4 %)