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Table 4 Hazard ratios (CCLG vs. GPOH) according to local treatment modality

From: Survival is influenced by approaches to local treatment of Ewing sarcoma within an international randomised controlled trial: analysis of EICESS-92

 

Local treatment modality

Subdivision of RT and surgery group

None

N = 23

Radiotherapy (RT) alone

N = 164

Surgery alone

N = 138

RT and surgery

N = 289

RT then surgery

N = 201

Surgery then RT

N = 88

No. events

 EFS

21

105

53

131

93

38

 OS

19

92

41

109

79

30

Unadjusted

 EFS

20 (2.64–161)

0.86 (0.58–1.26)

1.31 (0.76–2.25)

1.67 (1.05–2.66)

2.22 (0.81–6.07)

1.99 (1.05–3.78)

 OS

1.50 (0.56–3.96)

0.95 (0.63–1.44)

1.50 (0.81–2.80)

1.65 (1.00–2.74)

1.96 (0.72–5.37)

2.10 (1.02–4.30)

Adjusted for age, metastatic disease, primary site and histology

 EFS

53 (4.0–477)

0.92 (0.62–1.38)

1.24 (0.70–2.20)

1.82 (1.12–2.94)

2.40 (0.84–6.84)

2.50 (1.24–5.06)

 OS

2.09 (0.64–6.79)

1.06 (0.69–1.63)

1.41 (0.73–2.74)

1.81 (1.07–3.05)

2.21 (0.77–6.35)

2.76 (1.26–6.05)

Adjusted for age, metastatic disease, primary site, histology and time between the start of chemotherapy and starting local treatment

 EFS

 

0.91 (0.60–1.38)

1.24 (0.70–2.19)

1.61 (0.96–2.70)

1.98 (0.70–5.60)

2.83 (1.30–6.16)

 OS

 

1.04 (0.67–1.63)

1.43 (0.73–2.78)

1.68 (0.97–2.91)

1.94 (0.68–5.58)

3.39 (1.42–8.06)

  1. Hazard ratios greater than 1 indicate that CCLG patients had a higher risk of having an event or dying compared to GPOH patients
  2. Based on data excluding patients with unknown primary site because there were so few
  3. EFS event-free survival; OS overall survival