Figure 6. OS and LRFS curves of T3–4 NPC patients with different pretreatment levels of ALP.

A, 5-year OS rates were 69% in the increased ALP level group and 87% in the normal ALP level group (χ² = 3.003, P = 0.083). B, 5-year LRFS rates were 55% in the increased ALP level group and 68% in the normal ALP level group (χ² = 5.261, P = 0.022).