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The cumulative incidence of osteonecrosis (ON) in ALL2004 according to sex (a), age (b), and combined (c). A, Boys (n=2/190): 1.3%, SE, 0.9%; girls (n=8/136): 6.7%, SE, 2.3%. B, Age below 10 years (n=1/249): 0.42%, SE, 0.42%; age 10 years and above (n=9/77): 15.6%, SE, 4.8%. C, Girls 10 years and above (n=7/33): 25.6%, SE, 8.42%; others (n=3/293): 1.19%, SE, 0.68%.
