Mean scores on the EORTC QLQ-C30 for patients with head and neck cancer according to the level of pain during the last 24 h (BPI-Average pain intensity). The scales are as follows: PF, physical functioning; RF, role functioning; EF, emotional functioning; CF, cognitive functioning; SF, social functioning; QL, global quality of life; FA, fatigue; NV, nausea/vomiting; DY, dyspnea; SL, insomnia; AP, appetite loss; CO, constipation; DI, diarrhea; and FI, financial difficulties. For Figure 1
A, higher scores reflect better functioning; for Figure 1
B, higher scores indicate worse functioning. Significance was determined by Kruskal-Wallis tests.