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Table 3 Summary of univariate analyses of overall survival

From: Stereotactic body radiotherapy for very elderly patients (age, greater than or equal to 85 years) with stage I non-small cell lung cancer

Parameters

n

Hazard ratio (95% CI)

p value

Age

 

1.05 (0.98–1.12)

0.19*

Gender

   

 Female

17

1

0.72

 Male

64

1.21 (0.52–3.65)

 

PS (ECOG)

   

 0

55

1

0.61

 1–2

26

1.23 (0.42–3.65)

 

T stage

   

 T1a

42

1

 

 T1b, T2a

39

2.38 (1.05–5.39)

0.04*

CTV

 

1.01 (1.00–1.03)

0.05*

PTV

 

1.00 (0.99–1.01)

0.29

Histology

  

0.78

 Adenocarcinoma

35

1

 

 Squamous cell carcinoma

27

1.46 (0.47–4.57)

0.51

 Unproven

17

1.18 (0.35–3.92)

0.79

Tumor location

   

 Peripheral

6

1

 

 Central

75

1.29 (0.30–5.51)

0.73

Operability

   

 Yes

21

1

 

 No

60

1.03 (0.43–2.43)

0.94

Total dose

   

 48 Gy

60

1

 

 60 Gy

21

0.99 (0.93–1.07)

0.87

  1. Abbreviations: ECOG Eastern Cooperative Oncology Group, CI confidence interval.
  2. *p < 0.2.