Table 3. Uni- and multivariable logistic regression analysis in the prediction of non-response group in ANPC patients.

Predictors		Univariable analysis			Multivariable analysis*
		OR	95% CI	P	OR	95% CI	P
T1, ms		0.99	0.98–1.00	<0.001	0.99	0.98–1.00	0.031
T2, ms		0.94	0.89–0.99	0.046	1.11	0.98–1.25	0.097
PD, pu		0.67	0.54–0.84	<0.001	0.65	0.47–0.91	0.011
ADC, ×10-6 mm2/s		1.00	0.99–1.00	0.092
EBV-DNA
	<4000	Reference			Reference
	≥4000	4.28	1.51–12.18	0.006	25.21	2.73–231.90	0.004
Extranodal extension
	No	Reference			Reference
	Yes	4.68	1.66–13.24	0.004	3.95	0.68–22.86	0.125
Clinical stage
	III	Reference			Reference
	IV	5.53	1.93–15.82	0.002	6.72	1.11–40.63	0.037
Ki-67 expression
	Low	Reference			Reference
	High	10.88	3.42–36.62	<0.001	7.39	1.04–50.32	0.045

^*Variable with P < 0.05 at univariable analysis were included in the multivariable analysis.

ANPC = advanced nasopharyngeal carcinoma, OR = odds ratio, CI = confidence interval, T1 = longitudinal relaxation time, T2 = transverse relaxation time, PD = proton density, pu = percentage unit, ADC = apparent diffusion coefficient, EBV = Epstein–Barr virus