95 5 Appendix 4b. Spearman correlation coefficients of the WST versus the EORTC QLQ-H&N35 for the swallowing duration *: p<0.05, M0: before treatment, M3: 3 months after treatment, M6: 6 months after treatment WST Duration EORTC QLQ-H&N35 M0 (n = 101) M3 (n = 92) M6 (n = 92) Spearman’s ρ p-value Spearman’s ρ p-value Spearman’s ρ p-value Pain in mouth 0.125 0.205 0.253 0.015* -0.075 0.479 Swallowing 0.172 0.082 0.260 0.012* 0.176 0.094 Senses problems 0.064 0.523 0.177 0.091 0.051 0.629 Speech problems 0.070 0.482 0.291 0.005* 0.187 0.074 Trouble with social eating 0.178 0.072 0.277 0.008* 0.302 0.003* Trouble with social contact 0.104 0.297 0.274 0.008* 0.196 0.062 Less sexuality 0.166 0.096 -0.022 0.837 0.106 0.322 Teeth 0.015 0.883 0.085 0.421 0.098 0.359 Opening mouth 0.004 0.964 0.163 0.121 -0.047 0.656 Dry mouth 0.013 0.897 0.177 0.091 -0.022 0.832 Sticky saliva 0.015 0.879 0.238 0.022* 0.077 0.467 Coughing 0.090 0.364 0.092 0.385 0.018 0.866 Feeling ill 0.029 0.775 0.282 0.007* 0.112 0.291 Pain killers 0.047 0.637 0.020 0.847 -0.087 0.408 Nutritional supplements 0.093 0.348 0.192 0.067 0.151 0.150 Feeding tube -0.073 0.461 0.030 0.775 0.117 0.266 Weight loss -0.024 0.810 0.053 0.618 0.031 0.773 Weight gain -0.103 0.303 0.065 0.539 0.030 0.777
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