Table 2.

The correlation between patient characteristics before treatment and the SUVmax in FDG-PET of primary tumor

Characteristics	Number of patients	SUVmax of primary tumor		P-value
		Mean	95% C.I.
Age
<70 years	32	13.3	10.4–16.2	0.53
≥70 years	24	14.7	10.4–17.5
Gender
male	49	13.3	7.2–19.4	0.84
female	7	14.0	11.6–16.2
Tumor length
<50 mm	30	10.8	8.0–13.4	0.001*
≥50 mm	26	17.5	14.7–20.4
T stage
T1–2	18	6.2	3.3–9.0	<0.0001*
T3–4	38	17.5	15.6–19.5
N stage
N0	18	8.2	4.9–11.5	0.0001*
N1	38	16.6	14.3–18.9
UICC stage
I, II	21	6.4	4.0–8.9	<0.0001*
III, IV	35	18.4	16.5–20.2

C.I. = confidence interval.