Table 1.

Multivariable Cox proportional hazards analysis of overall survival^*

Characteristic	HR of death (95% CI)	P
No. of involved lymph nodes
0	1.00 (referent)
≥1	1.66 (1.14 to 2.41)	.009
Tumor ALDH expression status
Negative	1.00 (referent)
Positive	1.32 (1.00 to 1.74)	.054

^*ALDH = aldehyde dehydrogenase; CI = confidence interval; HR = hazard ratio.