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Table 1 The patient characteristics (n = 35)

From: Clinical results of proton beam therapy for elderly patients with non-small cell lung cancer

Characteristics
Age (years)
 Median (range) 82 (80–87)
Gender
 Male 9 (26%)
 Female 26 (74%)
Performance status
 0 14 (40%)
 1 15 (43%)
 2 6 (17%)
Comorbidity index
 0 5 (14%)
 1 17 (48.5%)
 2 8 (23%)
 3 3 (8.5%)
 4 2 (6%)
Operable or inoperable
 Operable 10 (29%)
 Inoperable 25 (71%)
Follow-up time (months)
 Median (range) 34 (10–72)
T category a
 T1 13 (37%)
 T2 13 (37%)
 T3 8 (23%)
 T4 1 (3%)
Stage a
 I 21 (60%)
 II 13 (37%)
 III 1 (3%)
Tumor location
 Right upper lobe 4 (11%)
 Right middle lobe 2 (6%)
 Right lower lobe 8 (23%)
 Left upper lobe 14 (40%)
 Left lower lobe 7 (20%)
Histopathology
 Squamous cell carcinoma 17 (48.5%)
 Adenocarcinoma 17 (48.5%)
 Non-small cell lung cacner 1 (3%)
Diameter of lung tumor (mm)
 Median (range) 32.0 (10.0–67.0)
Total dose (Gy (RBE))
 Median (range) 80.0 (60.0–80.0)
  1. Abbreviations: RBE relative biological dose effectiveness
  2. aTNM classification of malignant tumor 8th edition (Union for international cancer contorol)