Table 1

Overall survival by demographics and known breast cancer prognosis factors, Shanghai Breast Cancer Study

CovariablesLevelsNo. of subjectsNo. of deaths5-yr survival rate (%)P
Age at diagnosis<422784585.0
42–462773189.1
47–522705181.5
53–642865382.30.05
Education<Middle school1382980.2
Middle school4927984.0
>Middle school4817286.10.28
TNM0–I2771894.0
IIa3934688.7
IIb2454881.3
III–IV1224860.9
Unknown742075.4<0.01
ERPositive4897585.4
Negative2804385.1
Unknown3426282.60.52
PRPositive4927585.2
Negative2684185.3
Unknown3516482.70.49
SurgeryYes110417884.5
No00
Unknown7271.40.28
ChemotherapyYes103716784.6
No60984.9
Unknown14471.40.35
RadiotherapyYes42310276.4
No5275790.2
Unknown1612186.9<0.01
Tamoxifen useYes7108488.8
No2092986.7
Unknown1926766.1<0.01