highly significantP =0.004
However, differences between DFS, OS and CSS for the two age groups remained highly significant when only those patients treated since 1990 were analysed ( P =0.004, <0.001 and <0.001, respectively).
However, differences between DFS, OS and CSS for the two age groups remained highly significant when only those patients treated since 1990 were analysed ( P =0.004, <0.001 and <0.001, respectively).