Two-stage random survival forest (RSF) and generalized multifactor dimensionality reduction (GMDR). (BMI, body mass index; CRC, colorectal cancer; GWA, genome-wide association; MD, minimal depth; SNP, single-nucleotide polymorphism; WHR, waist-to-hip ratio; WST, waist circumference; VIMP, variable of importance. * WHR subgroups combined 2 our GWA and 65 outside GWA SNPs).