Table 1

Frequencies of IGF-I CA repeat alleles in colorectal adenoma cases and controls in the NHS (1989–94)

CA alleleCases(%)Controls(%)
111(0.2)3(0.6)
141(0.2)0(0)
161(0.2)0(0)
178(1.6)6(1.2)
1825(5.0)20(4.0)
19322(64.7)308(61.8)
20112(22.5)128(25.7)
2120(4.0)25(5.0)
228(1.6)8(1.6)