Table 7 Multivariate analysis of risk factors for observed survival

Age (>65 vs 0 to 64 years old)

2.22 (1.11 to 4.41)

0.02

Sex (men vs women)

1.78 (0.96 to 3.26)

0.06

Type of mutation

KIT 09 vs KIT 11

1.46 (0.44 to 4.79)

0.53

PDGRF vs KIT 11

1.07 (0.4 to 2.87)

0.90

WT vs KIT 11

1.21 (0.56 to 2.57)

0.63

All other vs KIT 11

0.83 (0.44 to 1.58)

0.58

Fletcher’s risk groups

IR vs LR

1.58 (0.65 to 3.88)

0.32

HR vs LR

2.27 (0.96 to 5.37)

0.06

Met vs LR

11.49 (2.9 to 45.54)

<0.001

Site

C17 vs C16

1.08 (0.57 to 2.05)

0.82

All other vs C16

1.23 (0.33 to 4.58)

0.76