Table 3.

Multivariate Cox regression analysis for survival in papillary thyroid carcinoma (PTC)

	LN-RFS			DRFS
Variable	RR	95% CI	P	RR	95% CI	P
ALDH1A1	2.266	1.207 to 4.254	0.011	3.293	1.216 to 8.917	0.019
T status	1.518	1.292 to 1.932	0.038	2.204	1.134 to 5.276	0.021
N status	2.109	1.381 to 4.170	0.023	2.836	1.285 to 6.305	0.018

ALDH1A1 (low, the low expression of ALDH1A1; high, the high expression of ALDH1A1); CI, confidence interval; RR, relative risk.