Table 2 Univariate Cox regression with respect to FFDM. PET parameters were included as metric parameters

Sex male

2.18

0.86–5.54

0.1

Age > 61y

1.49

0.81–2.72

0.2

T-stage > 2

2.65

1.38–5.09

0.003

N-stage > 1

1.8

0.8–4.04

0.16

UICC-stage > III

1.7

0.72–4.04

0.23

Chemotherapy none

0.96

0.43–2.16

0.92

HPV negative

1.48

0.55–4

0.44

MTV_prim

1.03

1–1.05

0.022

MTVall

1.04

1.02–1.06

< 0.001

TLG_prim

1.001

1–1.003

0.084

TLGall

1.002

1.001–1.004

< 0.001

SUV_prim

1.02

0.98–1.06

0.33

SUVall

1.03

0.99–1.08

0.11