Table 1.

Baseline patient characteristics

VariableNumberPIK3CA mutation (%)Wild-type PIK3CA (%)P value
All19431 (100)163 (100)Not applicable
Median age, y5856590.21
range, 25–81range, 36–71range, 25–81
Ethnicity
 White14021 (68)119 (73)0.58
 African American286 (19)22 (13.5)
 Hispanic192 (6.5)17 (10.5)
 Asian72 (6.5)5 (3)
Tumor site
 Colon15628 (90)128 (79)0.15
 Rectum383 (10)35 (21)
KRAS (n = 189)a
KRAS mutation8422 (71)68 (43)0.006
KRAS wild-type919 (29)90 (57)
  • aOnly patients tested for KRAS mutations are included in the analysis.