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Table 3 Multivariate analyses for overall survival

From: Patterns of brain metastasis immediately before prophylactic cranial irradiation (PCI): implications for PCI optimization in limited-stage small cell lung cancer

Variable

Univariate

Multivariate

HR (95% CI)

P

HR (95% CI)

P

Age at diagnosis

1.022 (0.986–1.059)

0.235

  

Gender

1.725 (0.728–4.086)

0.215

  

Smoking status

1.205 (0.614–2.366)

0.588

  

T stage (1–2 vs 3–4)

2.247 (1.215–4.157)

0.010*

2.610 (1.364–4.993)

0.004*

N stage (0–2 vs 3)

1.513 (0.771–2.968)

0.229

2.160 (1.056–4.417)

0.035*

CRT-D (months)

1.219 (1.024–1.451)

0.026*

1.227 (1.026–1.466)

0.025*

Variable

HR (95% CI)

P

HR (95% CI)

P

Age at diagnosis

1.022 (0.986–1.059)

0.235

  

Gender

1.725 (0.728–4.086)

0.215

  

Smoking status

1.205 (0.614–2.366)

0.588

  

T stage (1–2 vs 3–4)

2.247 (1.215–4.157)

0.010*

2.637 (1.348–5.158)

0.005*

N stage (0–2 vs 3)

1.513 (0.771–2.968)

0.229

2.016 (0.967–4.202)

0.061

pre-PCI BM

4.336 (2.421–7.765)

<  0.001*

4.143 (2.318–7.406)

<  0.001*

  1. Abbreviation: HR Hazard ratio, CI Confidence interval, PCI Prophylactic cranial irradiation, BM Brain metastasis, CRT-D Chemoradiotherapy duration, pre-PCI BM Brain metastasis immediately before PCI. Age and CRT-D as continuous variables. Cox regression was employed for multivariate analysis. (*) statistically significant