Table 1 Characteristics of subjects enrolled in the study
From: Can selenium levels act as a marker of colorectal cancer risk?
Polish group | Cases | Controls |
|---|---|---|
Year of birth - average | 1944 | 1944 |
- range | 1926 – 1973 | 1928 – 1971 |
First-degree relatives | ||
- with colorectal cancer | 9 | 9 |
- another cancer site | 26 | 26 |
Estonian group | ||
Year of birth - average | 1937 | 1938 |
- range | 1920-1966 | 1920-1965 |
First-degree relatives | ||
- with colorectal cancer | 3 | - |
- another cancer site | - | - |