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Table 5 Univariate and multivariate Cox regression analyses for cause-specific survival and overall survival (n = 72)

From: Clinical outcomes of transoral videolaryngoscopic surgery for hypopharyngeal and supraglottic cancer

Variables

 

Cause-specific survival

Overall survival

No.

Univariate analysis

Multivariate analysis

Univariate analysis

Multivariate analysis

 

HR

(95% CI)

P-values

HR

(95% CI)

P-values

HR

(95% CI)

P-values

HR

(95% CI)

P-values

Age, y

 

<70

45

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

≧70

27

0.93

(0.22-3.89)

0.920

1.15

(0.24-5.42)

0.858

0.94

(0.34-2.60)

0.913

1.00

(0.34-2.89)

0.994

Sex

 

Men

67

1.00

  

1.00

  

1.00

reference

 

1.00

reference

 

Women

5

not calculablea

−

not calculablea

−

0.61

(0.08-4.75)

0.636

1.27

(0.13-12.38)

0.835

Tumor site

 

HPC

58

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

SGC

14

0.57

(0.07-4.68)

0.605

0.38

(0.04-3.43)

0.386

0.60

(0.14-2.64)

0.498

0.54

(0.11-2.69)

0.450

T stage

 

Tis + T1

32

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

T2-3

40

2.69

(0.54-13.34)

0.227

0.68

(0.09-5.24)

0.714

1.58

(0.57-4.35)

0.380

1.27

(0.29-5.54)

0.749

N stage

 

N0-1

48

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

N2-3

24

15.45

(1.90-125.69)

0.010*

25.51

(2.29-284.17)

0.008*

2.94

(1.09-7.90)

0.032*

4.90

(1.26-19.08)

0.022*

Multiple cancer

 

No

18

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

Yes

54

1.08

(0.22-5.36)

0.923

2.63

(0.45-15.20)

0.281

1.21

(0.39-3.82)

0.742

1.74

(0.47-6.41)

0.405

Previous RT

 

No

60

1.00

reference

 

1.00

  

1.00

reference

 

1.00

reference

 

Yes

12

0.68

(0.08-5.52)

0.717

not calculableb

−

1.09

(0.31-3.83)

0.894

2.23

(0.34-14.86)

0.406

  1. HPC hypopharyngeal cancer, SGC supraglottic cancer, RT Radiotherapy, HR hazard ratio, CI confidence interval
  2. * Statistically significant (p < 0.05)
  3. aHR was not calculable because no woman died of the disease
  4. bHR was not calculable because of strong confounding with N stage