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Table 2 The results for risk factors associated with OS in the Cox proportional hazards model

From: Interstitial lung abnormalities in patients with stage I non-small cell lung cancer are associated with shorter overall survival: the Boston lung cancer study

Characteristic

HR

95%CI

P value

ILA (score 2)a

2.88

1.37–6.04

0.005

Age

1.03

1.00–1.07

0.028

Sex (male)

0.62

0.33–1.16

0.135

Smoking status (never smoker)b

2.18

0.66–7.17

0.200

Surgery

0.21

0.09–0.50

< 0.001

Chemotherapy

2.57

1.26–5.27

0.010

Radiation therapy

0.96

0.31–2.98

0.954

  1. The concordance index for the Cox proportional hazards model was 0.737
  2. aComparison is ILA score 2 with ILA score 0 or 1
  3. bComparison is never smoker with current/ex-smoker
  4. OS overall survival, ILA interstitial lung abnormalities, HR hazard ratio, CI confidence interval