Table 2.

Correlation between the presence of CTCs and BM-DTCs in BC PDX-bearing mice

	Number of mice with BM-DTCs	Number of mice without BM-DTCs
Number of mice with CTCs	16	13
Number of mice without CTCs	2	15

The data are presented in the 2 × 2 collapsed table, ignoring the strata representing different PDX lines. P = 0.0047; Fisher’s Exact test and P = 0.0364; Cochran-Mantel-Haenszel test, adjusting for PDX line.

BC, breast cancer; BM-DTC, disseminated tumor cells in bone marrow; CTC, circulating tumor cell; PDX, patient-derived xenograft.