Other factors associated with a lower likelihood for KRAS testing (Table 3) included living in an area where the percentage of adults with no high school diploma was 17.6% or greater compared with an area with less than 6.3% (RR, 0.92; 95% CI, 0.88-0.96; P < .001), Medicaid compared with private insurance (RR, 0.94; 95% CI, 0.91-0.98; P < .001), treatment at a community compared with an academic cancer program (RR, 0.92; 95% CI, 0.88-0.96; P < .001), and East South Central facilities compared with New England facilities (RR, 0.78; 95% CI, 0.73-0.83; P < .001). This evidence concerns the gene KRAS and cancer.