Table 8:

Significant associations between breast conservative surgery or mastectomy in univariate analysis.

		Conservative		Mastectomy		Chi-2
		Nb	%	Nb	%	p-value
All patients		733	45	896	55
Period	P1	103	14.1	177	19.8	0.002
	P2	220	30	283	31.6
	P3	410	55.9	436	48.7
Subtypes	Luminal A	151	20.6	242	27	<0.0001
	Luminal B Her2−	90	12.3	108	12.1
	Luminal B Her2+	129	17.6	173	19.3
	Her2+	76	10.4	144	16.1
	Triple Negative	285	38.9	228	25.4
	Luminal Her2− Grade?	2	0.3	1	0.1
cT stage	cT0-1	127	17.3	113	12.6	<0.0001
	cT2	509	69.4	426	47.5
	cT3	85	11.6	265	29.6
	cT4	12	1.6	92	10.3
cN stage	cN0	423	57.7	367	41	<0.0001
	cN1	302	41.2	515	57.4
	cNx	8	1.1	14	1.6
ypT	ypT0	246	33.6	274	30.6	0.274
	ypTis	70	9.5	77	8.6
	ypT >= 1	417	56.9	545	60.8
pCR	Yes	273	37.2	288	32.1	0.018
	No	460	62.8	608	67.9

Abbreviations: cT, clinical tumor size stage; cN, clinical lymph node status; ypT, pathologic tumor status after neoadjuvant chemotherapy; pCR, pathologic complete response.