Table 1. Prognostic factors related to axillary lymph node invasion in early (T1) breast cancer: Univariate analysis.

	Number of women	No. of women with positive nodes (%)	OR	95% CI	P-value
Histologic type
Ductal	178	47 (26%)	1
Lobular	16	5 (31%)	1.26	0.42–3.84	0.676
Tubular	10	0 (0%)	0.00	0.00–1.09	0.069
Rest of types	8	2 (25%)	0.93	0.18–4.76	0.930
Tumour size
>1 cm	152	45 (30%)	1
1–0.6 cm	51	9 (18%)	0.51	0.23–1.13	0.098
⩽0.5 cm	9	0 (0%)	0.00	0.00–1.04	0.063
uPA–PAI-1
0	55	10 (18%)	1
1–4	48	15 (31%)	2.04	0.82–5.12	0.126
5–6	86	25 (29%)	1.84	0.81–4.22	0.148
Unknown	23	4 (17%)	0.80	0.26–3.40	0.934
Hormone receptors
ER−PR−	61	14 (23%)	1
ER+PR−	24	7 (29%)	1.38	0.48–4.00	0.551
ER+PR+	124	33 (27%)	1.21	0.59–2.49	0.591
Unknown	3	0 (0%)	0.00	0.00–4.68	1.000
Nuclear grade
1 and 2	122	32 (26%)	1
3	57	16 (28%)	1.10	0.54–2.22	0.796
Unknown	33	6 (18%)	0.63	0.24–1.65	0.343
Histologic grade
1 and 2	139	31 (22%)	1
3	40	17 (43%)	2.58	1.22–5.41	0.013
Unknown	33	6 (18%)	0.77	0.29–2.04	0.605
Ki67
⩽10%	89	16 (18%)	1
>10%	99	35 (35%)	2.50	1.26–4.93	0.008
Unknown	24	3 (13%)	0.65	0.17–2.45	0.527
c-erb-B2
Negative	159	43 (27%)	1
Positive	27	7 (26%)	0.94	0.37–2.39	0.904
Unknown	26	4 (15%)	0.49	0.16–1.51	0.213
p53
Negative	154	41 (27%)	1
Positive	35	10 (29%)	1.10	0.49–2.49	0.815
Unknown	23	3 (13%)	0.41	0.13–1.46	0.171
CD44
3–6	110	18 (16%)	1
1–2	22	5 (23%)	1.50	0.49–4.60	0.475
Negative	50	25 (50%)	5.11	2.41–10.8	<0.001
Unknown	30	6 (20%)	1.28	0.45–3.57	0.640