showed a trendP =0.072
The combination of both SNPs also showed a trend, albeit insignificant, towards decreased risk for developing osteosarcoma regardless the age at diagnosis ( P =0.072; OR=0.70; 95% CI=0.47–1.03), although individual XRCC3 rs861539 C>T and NBN rs1805794 G>C SNPs were not significantly associated with osteosarcoma in the whole cohort.