Table 4. Interaction between CDCP1-IHC or -FISH status and N status in disease-free survival and distant disease-free survival.

	Disease-free survival			Distant disease-free survival
	HR (95% CI)	p	5-year survival	HR (95% CI)	p	5-year survival
IHC-N-	1.00	−	0.80 (0.55–0.92)	1.00	−	0.80 (0.55–0.92)
IHC+N-	0.85 (0.19–3.72)	0.828	0.85 (0.61–0.95)	0.40 (0.07–2.27)	0.414	0.89 (0.63–0.97)
IHC-N+	1.21 (0.21–6.84)	0.829	0.74 (0.29–0.93)	0.56 (0.06–5.06)	0.946	0.89 (0.43–0.98)
IHC+N+	5.25 (1.51–18.20)	0.009	0.30 (0.12–0.50)	3.32 (1.03–10.70)	0.044	0.31 (0.13–0.52)
FISH-N-	1.00	−	0.82 (0.64–0.91)	1.00	−	0.84 (0.66–0.93)
FISH+N-	0.76 (0.09–6.64)	0.800	0.86 (0.33–0.98)	0.69 (0.08–6.20)	0.744	0.86 (0.33–0.98)
FISH-N+	2.03 (0.64–6.51)	0.231	0.61 (0.34–0.80)	1.87 (0.53–6.59)	0.332	0.65 (0.37–0.83)
FISH+N+	8.89 (2.64–29.92)	< 0.001	0.09 (0.01–0.33)	7.18 (2.09–24.65)	0.002	0.12 (0.01–0.40)

Adjusted hazard ratios (HRs) from a Cox multivariable model (with age, tumor size, Ki-67 levels, and DCIS as additional covariates); significance (p) of the HRs and estimated 5-year survival are listed.