amlxray {faraway} | R Documentation |
Match pair study for AML and Xray link
Description
A matched case control study carried out to investigate the connection between X-ray usage and acute myeloid leukemia in childhood. The pairs are matched by age, race and county of residence.
Format
A data frame with 238 observations on the following 11 variables.
- ID
a factor denoting the matched pairs
- disease
0=control, 1=case
- Sex
-
F
orM
- downs
Presence of Downs syndrome:
no
oryes
- age
Age in years
- Mray
Did the mother ever have an Xray:
no
oryes
- MupRay
Did the mother have an Xray of the upper body during pregnancy:
no
oryes
- MlowRay
Did the mother have an Xray of the lower body during pregnancy:
no
oryes
- Fray
Did the father ever have an Xray:
no
oryes
- Cray
Did the child ever have an Xray:
no
oryes
- CnRay
Total number of Xrays of the child
1
=none <2
=1 or 2 <3
=3 or 4 <4
= 5 or more
Source
Chap T. Le (1998) "Applied Categorical Data Analysis" Wiley.