Table 3. Influence of tumour size, nuclear grade, necrosis and age on treatment modality (number and percent patients).

	CS		CS+RT		Mastectomy		Total
	N	%	N	%	N	%	N	%
Tumour size (pT, mm) a
⩽10	62	14.4	339	78.6	30	7	431	40.6
11–20	14	4.8	223	76.6	54	18.6	291	27.4
>20	5	1.5	120	35.3	215	63.2	340	32
Grade b
Low	56	20.9	171	63.8	41	15.3	268	21
Intermediate	30	6.2	322	65.7	138	28.1	490	38.5
High	12	2.3	294	57.1	209	40.6	515	40.5
Necrosis c
None necrosis	68	13.4	334	65.9	105	20.7	507	42
No comedo necrosis	15	6.6	136	59.6	77	33.8	228	19
Comedo necrosis	9	1.9	271	57.2	194	40.9	474	39
Age (years)
<50	26	26.2	203	25.5	141	35.9	370	28.7
50–60	41	41.4	284	35.6	136	34.6	461	35.8
61–70	14	14.1	198	24.8	73	18.6	285	22.1
>70	18	18.2	112	14.1	43	10.9	173	13.4

Abbreviations: CS=conservative surgery; RT=radiotherapy.

Evaluable cases: ^a1062 (82.4%); ^b1273 (98.7%); and ^c1209 (93.8%).