Organizing medical oncology care at a regional level and its subsequent impact on the quality of early breast cancer management: a before-after study

Table 3 Univariate analysis of prognostic factors associated with 24-month progression-free survival

Variable	N	Fail	24-month progression-free survival (%)	p
Age (years)				0.38
< 50	113	11	92.7
[50–74]	395	28	97.1
≥ 75	110	9	96.4
Hormonal status
Estrogen receptor				<0.01
Positive	539	37	97.3
Negative	73	10	85.9
Progesterone receptor				<0.001
Positive	482	29	97.8
Negative	130	18	89.2
SBR grade				0.02
1	186	8	98.0
2	309	25	96.6
3	107	13	91.3
TNM classification
T (mm)				0.0001
<20	388	19	97.9
≥ 20	217	26	92.7
N				<0.0001
0	405	18	98.2
≥ 1	203	28	93.0
Period				0.71
Before	287	32	96.8
After	331	16	95.6
Centre				0.63
Reference centre	305	25	96.1
Peripheral centres	313	23	95.3

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