Table 1.

Patient, tumor, and treatment characteristics

Characteristic	n	%
Age (y), median (range)	77 (49–95)
KPS, median (range)	70 (50–100)
Gender
Male	138	46.8
Female	157	53.2
BMI (kg/m2)*
<30	225	71.2
≥30 (obesity)	91	28.8
Tumor
Primary NSCLC	285	90.2
Oligometastatic	13	4.1
Recurrent	18	5.7
Tumor distance to CW (cm)
<1	218	69.0
≥1	98	31.0
Prescription doses
18–20 Gy × 3	113	35.8
12 Gy × 4	114	36.1
9–10 Gy × 5	62	19.6
Other	27	8.5

Abbreviations: BMI = body mass index; CW = chest wall; KPS = Karnofsky performance status; NSCLC = non-small cell lung cancer.

^*Body mass index for patients with multiple treatments was calculated separately before each treatment.