Table 2 Proportional subdistribution hazard analysis in training cohort

Age

65–69

Reference

Reference

70–74

0.99

0.67–1.46

1.18

0.68–2.05

75–79

1.07

0.74–1.55

2.49

1.54–4.01

80–84

1.25

0.85–1.83

2.93

1.81–4.74

 > 84

1.40

0.93–2.12

3.31

2–5.48

Race

White

Reference

Reference

Black

1.16

0.65–2.07

0.92

0.43–1.98

Other

1.21

0.79–1.86

0.74

0.45–1.21

Sex

Male

Reference

Reference

Female

1.12

0.87–1.45

0.82

0.63–1.07

Year of diagnosis

2004–2008

Reference

Reference

2009–2013

1.12

0.85–1.46

0.68

0.52–0.89

2014–2018

0.85

0.62–1.18

0.39

0.25–0.6

Laterality

Left

Reference

Reference

Right

1.38

1.09–1.75

0.83

0.64–1.06

AJCC stage

I

Reference

Reference

II

1.41

0.95–2.08

1.33

0.93–1.88

III

2.26

1.72–2.98

0.83

0.61–1.13

Marriage

No

Reference

Reference

Yes

0.82

0.63–1.07

0.89

0.68–1.16

Grade

I/II

Reference

Reference

III/IV

1.85

1.24–2.75

0.80

0.59–1.07

Surgery

No Surgery

Reference

Reference

Local tumor excision

1.41

0.52–3.86

0.83

0.19–3.54

Partial nephrectomy

0.23

0.06–0.81

2.04

0.69–6.05

Radical nephrectomy

0.42

0.18–0.96

1.00

0.42–2.38

Radiotherapy

No

Reference

Reference

Yes

3.35

1.6–7.02

0.54

0.14–2.03

Chemotherapy

No

Reference

Reference

Yes

1.05

0.74–1.49

0.61

0.37–1.03

Tumor size

 < 2 cm

Reference

Reference

2–4 cm

1.31

0.9–1.9

1.28

0.87–1.89

 > 4 cm

1.58

1.07–2.33

1.14

0.76–1.73