09-28-2008, 04:55 PM
The prevalance of women is compared in two groups of women based on parity.The following data are obtained at age 70
in both groups:
children
yes no
breast cancer y 120 180 = 300
n 1380 820 = 2220
1500 1000 =2500
Based on the data what is the relative risk (risk ratio)for development of breast cancer in childless women when
compared with women who had children?
a.)0.67
b.)1.2
c.)1.5
d.)1.8
e.)2.25
in both groups:
children
yes no
breast cancer y 120 180 = 300
n 1380 820 = 2220
1500 1000 =2500
Based on the data what is the relative risk (risk ratio)for development of breast cancer in childless women when
compared with women who had children?
a.)0.67
b.)1.2
c.)1.5
d.)1.8
e.)2.25