Gene expression profiling of breast cancer survivability by pooled cDNA microarray analysis using logistic regression, artificial neural networks and decision trees

Table 2 Clinical variables of each dataset

Item	Wang et al. [[15]]	Ivshina et al. [[13]]	Sotiriou et al. [[14]]	Desmedt et al. [[12]]	Combined database
Clinical data	Lymph node status	Lymph node status	Lymph node status	Lymph node status	Lymph node status
	Estrogen receptor	Estrogen receptor	Estrogen receptor	Estrogen receptor	Estrogen receptor
		Age	Age	Age	Age
		Tumor size	Tumor size	Tumor size	Tumor size
		Histopathologic grade	Histopathologic grade	Histopathologic grade	Histopathologic grade
Treatment	Estrogen therapy	Estrogen therapy	Tamoxifen therapy	Surgical therapy	Surgical therapy
	Adjuvant therapy	Adjuvant therapy	Surgical therapy		Tamoxifen therapy
	Surgical therapy	Surgical therapy			Estrogen therapy
					Adjuvant therapy
Survival	Distant metastasis events	Relapse events^a	Relapse events ^b	Relapse events ^b	Relapse events ^a
	Distant metastasis time	Relapse time	Relapse time	Relapse time	Relapse time
			Distant metastasis events	Survival events
			Distant metastasis time	Survival time
				Distant metastasis events
				Distant metastasis time

^a Data includes death by breast cancer or any form of breast cancer recurrence (including local lymphatic drainage and distant metastases).
^b Data includes any form of breast cancer recurrence (including local lymphatic drainage and distant metastases).

ISSN: 1471-2105