. 2008 Aug 5;10(4):R67. doi: 10.1186/bcr2128

Table 6.

Odds ratios (95% confidence interval) of prognostic factors among invasive breast cancers according to molecular phenotype, Nurses' Health Study (1976 to 1996)

Tumour type	Luminal A		Luminal B		Her2 type		Basal		Unclassified
	n	OR	n	OR (95%CI)	n	OR (95%CI)	n	OR (95%CI)	n	OR (95%CI)
Tumour size^a,b
≤ 2.0 cm	1025		54		48		107		57
>2.0 cm	537	1.0 (Ref)	55	1.9 (1.3 to 2.8)	68	2.6 (1.8 to 3.9)	119	2.0 (1.5 to 2.7)	44	1.4 (0.9 to 2.1)

Tumour grade^a
Low/Intermediate	478		26		21		33		16
High	252	1.0 (Ref)	20	1.4 (0.8 to 2.6)	43	3.6 (2.1 to 6.3)	99	5.3 (3.5 to 8.1)	30	3.4 (1.8 to 6.4)

Nodal status^a,b
No nodes	1103		72		61		145		70
Any nodes	547	1.0 (Ref)	44	1.2 (0.8 to 1.7)	67	2.1 (1.5 to 3.1)	100	1.3 (1.0 to 1.7)	40	1.1 (0.7 to 1.6)

Menopausal status
Postmenopausal	1289		76		97		187		83
Premenopausal	334	1.0 (Ref)	35	1.8 (1.2 to 2.7)	27	1.1 (0.7 to 1.7)	51	1.1 (0.8 to 1.5)	25	1.2 (0.7 to 1.8)

^aAdjusted for age (five-year categories).^bTumour characteristics abstracted from medical pathology reports. CI, confidence interval; OR, odds ratio.