Table 2

 O6-methylguanine methyltransferase (MGMT) expression and K-ras mutation in the whole sample set

MGMT expressionTotal
Undetectable/reducedNormal
Undetectable/reduced expression was assessed using immunohistochemistry for frozen tumours and western analysis for cancer cell lines.
For this analysis, p = 0.05 (Fisher’s exact test). Note that the borderline association is actually in the opposite direction to that detected by Esteller and colleagues.20
K-ras mutation
    Absent401757
    Present191837
Total593594