Table 1 Patient characteristics

Age (years)

67

(3–92)

66

(21–91)

Sex, n (%)

 Male

296

(61.0)

166

(55.0)

 Female

189

(39.0)

136

(45.0)

Follow-up period (months)

25.7

(0–115.2)

25.5

(0–50.1)

Primary site, n (%)

 Lung

114

(23.5)

80

(26.5)

 Liver

66

(13.6)

23

(7.6)

 Gastrointestinal

55

(11.3)

39

(12.9)

 Prostate

42

(8.7)

4

(1.3)

 Breast

39

(8.0)

14

(4.6)

 Others

169

(34.8)

142

(47.0)

Metastases other than bone, n (%)

 No

129

(26.6)

157

(52.0)

 Yes

356

(73.4)

145

(48.0)

PS, n (%)

ECOG

0

KPS

100 − 90

61

(12.6)

63

(20.9)

ECOG

1

KPS

80 − 70

167

(34.4)

119

(39.4)

ECOG

2

KPS

60 − 50

132

(27.2)

76

(25.2)

ECOG

3

KPS

40 − 30

116

(23.9)

42

(13.9)

ECOG

4

KPS

20 − 10

9

(1.9)

2

(0.7)

The NRF model, n (%)

Group I

92

(19.0)

100

(33.1)

Group II

205

(42.3)

149

(49.3)

Group III

188

(38.8)

53

(17.5)