Table 1.

Statistical differences between patient subgroups in recurrence

Patient subgroups	P value	χ2
High-risk + positive CTC vs high-risk + negative CTC	.043	4.101
High-risk + positive CTC vs low-risk + positive CTC	.025	5.002
High-risk + positive CTC vs low-risk + negative CTC	8.9e-06	19.729
High-risk + negative CTC vs low-risk + positive CTC	.224	1.476
High-risk + negative CTC vs low-risk + negative CTC	.006	7.633
Low risk + positive CTC vs low-risk + negative CTC	.734	0.115

Abbreviation: CTC = circulating tumor cell.