SLC2A1 and osteosarcoma: Regarding overall survival for the flat-bone osteosarcomas, the expression of GLUT-1 (% of stained cells and IRS score) was associated with an increased risk of death HR = 1.20 (95% CI: 1.00–1.44) and HR = 1.15 (95% CI: 1.00–1.32), respectively.