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Table 2 Univariate and multivariate analysis of disease-free survival

From: Role of postoperative radiotherapy in dermatofibrosarcoma protuberans: a propensity score-matched analysis

 

Univariate

Multivariate

Variables

5-year DFS (95% CI)

P value (log-rank) *

Hazard ratio

95% CI

P value

Presentation

 

0.253

   

 Primary

92.4 (92.3–92.5)

    

 Recurrent

85.4 (85.3–85.5)

    

Gender

 

0.151

   

 Male

87.8 (87.7–87.9)

    

 Female

95.3 (95.2–95.4)

    

Age(years)

 

0.002

4.699

1.672–13.204

0.003

 <  50

93.7 (93.6–93.8)

    

 ≥ 50

81.3 (81.2–81.4)

    

Site

 

0.296

   

 Trunk

90.3 (90.2–90.4)

    

 Extremities

92.3 (92.2–92.4)

    

 Head and neck

85.9 (85.8–86.0)

    

Tumor size, cm

 

0.032

2.267

0.844–6.091

0.105

 <  5

92.4 (92.3–92.5)

    

 ≥ 5

82.8 (82.7–82.9)

    

Lesion number

 

0.072

0.199

0.048–0.820

0.026

 1

90.3 (90.2–90.4)

    

 ≥ 2

84.6 (84.4–84.8)

    

Margin status

 

0.121

   

 Negative

91.5 (86.2–96.8)

    

 Positive

80.0 (61.0–99.0)

    

Margin width, cm

 

0.030

0.211

0.070–0.633

0.006

 <  2

73.7 (73.5–73.9)

    

 ≥ 2

95.1 (95.1–95.1)

    

Radiotherapy

 

0.171

   

 No

92.5 (92.4–92.6)

    

 Yes

82.8 (82.7–82.9)

    

Histological subtype

 

< 0.001

1.645

1.016–2.665

0.043

 Ordinary

93.2 (93.2–93.2)

    

 Fibrosarcoma

57.3 (57.0–57.3)

    

 Myxoid

83.3 (83.0–83.6)

    
  1. DFS: disease-free survival, CI confidence interval. *Log-rank test for equality of survivor functions. **Lesion number at the original site
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Radiation Oncology

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