|
Characteristics
|
X-ray (n = 22)
|
Proton (n = 8)
|
p value
|
|---|
|
Age [years; median (range)]
|
75 (55–84)
|
77 (62–85)
|
0.640
|
|
Sex
|
|
Female
|
0 (0%)
|
1 (12.5%)
|
0.092
|
|
Male
|
22 (100%)
|
7 (87.5%)
| |
|
Smoking Status
|
|
Never smoker
|
0 (0%)
|
1 (12.5%)
|
0.092
|
|
Current or Ex-smoker
|
22 (100%)
|
7 (87.5%)
| |
|
ECOG performance
|
|
0–1
|
13 (59.1%)
|
8 (100%)
|
0.031
|
|
2–3
|
9 (40.9%)
|
0 (0%)
| |
|
Clinical Stage
|
|
IA-IB
|
15 (68.2%)
|
4 (50.0%)
|
0.361
|
|
IIA-IIB
|
7 (31.8%)
|
4 (50.0%)
| |
|
Histology
|
|
Adenocarcinoma
|
5 (31.3%)
|
2 (28.6%)
|
0.775
|
|
Squamous cell carcinoma
|
10 (62.5%)
|
5 (71.4%)
| |
|
Others
|
1 (6.2%)
|
0 (0%)
| |
|
Not proven
|
6
|
1
| |
|
Pulmonary function test
|
|
FEV1
|
|
> 50%
|
21 (95.5%)
|
8 (100%)
|
0.540
|
|
≤ 50%
|
1 (4.5%)
|
0 (0%)
| |
|
DLCO
|
|
> 60%
|
9 (40.9%)
|
2 (25.0%)
|
0.424
|
|
≤ 60%
|
13 (59.1%)
|
6 (75.0%)
| |
|
DLCO
|
|
> 40%
|
20 (90.9%)
|
7 (87.5%)
|
0.783
|
|
≤ 40%
|
2 (9.1%)
|
1 (12.5%)
| |
|
GAP index
|
|
1
|
9 (40.9%)
|
1 (12.5%)
|
0.144
|
|
2–3
|
13 (59.1%)
|
7 (87.5%)
| |
- ECOG Eastern Cooperative Oncology Group, FEV1 forced expiratory volume in 1 s; DLCO, diffusing capacity of the lung for carbon monoxide
