TABLE 3.

Analysis of Predictive Factors for ¹⁸F-FDG PET/CT Recurrence Detection in Patients with Proven SCR

Risk factor	Univariate analysis			Multivariate analysis
Risk factor	P	OR	95% CI	P	OR	95% CI
Age < 62 y old	1	0.989	0.755
Male	0.70	1.142	0.614–2.124
Smoking > 10 pack-years	0.26	0.957	0.896–1.022
Alcohol > 3 drinks/d	0.30	1.207	0.881–1.654
HNSCC history	0.51	1.196	0.748–1.915
Body mass index < 22	0.010	0.738	0.579–0.941	0.004	0.277	0.116–0.658
Primary location
Oral cavity	0.006	2.002	1.233–3.253	0.879	1.179	0.142–9.775
Oropharynx	0.016	1.292	1.06–1.575	0.258	3.366	0.412–27.522
Larynx	0.41	0.927	0.78–1.103
Hypopharynx	0.11	1.093	0.995–1.2
CUP	0.68	0.984	0.933–1.038		1
Synchronous cancer	1	1.004	0.938–1.075
Initial PETup	0.005	1.481	1.141–1.922	0.001	25.582	7.939–82.34
Advanced stage III/IV	0.002	1.904	1.282–2.826	0.038	2.810	1.061–7.440
Initial treatment^*	0.013	1.493	1.107–2.013	0.319	0.627	0.251–1.569

↵* Surgery.
CUP = carcinoma unknown primary.