Table 4 Univariate and multivariate analysis for overall survival (OS)

Histology (lung vs. others)

1.52

0.97–2.38

0.09

Age (> 55 vs. ≤55)

2.05

1.32–3.18

0.004

1.04

1.09–10.7

0.015

Gender (male vs. female)

1.23

0.80–1.88

0.34

DS-GPA (> 2.5 vs. ≤2.5)

0.38

0.25–0.58

< 0.001

0.8

0.56–1.28

0.45

RPA (1 vs. > 1)

0.61

0.41–0.93

0.021

0.46

0.21–0.97

0.040

Number of BM (1 vs. > 1)

0.88

0.57–1.36

0.58

ECM (yes vs. No)

1.9

1.24–3.10

< 0.001

1.70

0.77–3.75

0.19

KPS (≥80% vs. < 80%)

0.29

0.18–0.49

< 0.001

0.97

0.95–0.99

0.040

GTV volume (< 2.07 vs. ≥2.07)

0.60

0.39–0.93

0.015

0.93

0.85–2.58

0.16

Size (> 10 mm vs. < 10 mm)

1.32

0.83–2.11

0.25

Dose distribution (HG vs. INH)

1.32

0.84–2.08

0.21

ST concurrently (group 1 vs. group 2)

0.70

0.46–1.07

0.09

IT (yes vs. no)

0.55

0.32–0.99

0.08

IT concurrently (yes vs. no IT)

0.41

0.23–0.74

0.02

0.22

0.08–0.59

0.003

TT (yes vs. no)

0.79

0.51–1.23

0.32

TT concurrently (yes vs. no TKI)

1.01

0.65–1.60

0.95

CT (yes vs. no)

1.07

0.70–1.63

0.73

CT concurrently (yes vs. no CT)

0.93

0.32–1.41

0.72