Table 4.

Regression model for predicting EORTC QLQ-C30 scores using age, sex, and the presence of health conditions

	Intercept	Sex	Age in years	Age in years (squared)	Age-by-sex	Health conditions (yes/no)
Physical functioning	84.533	0.463	0.564	-0.007	-0.053	-7.443
Role functioning	90.685	−3.946	0.378	−0.005	0.030	−11.821
Emotional functioning	83.923	−6.531	−0.272	0.006	0.062	−14.523
Cognitive functioning	81.214	−2.626	0.567	−0.005	0.053	−10.696
Social functioning	92.991	4.809	0.026	0.001	−0.084	−11.907
Global health/QoL	79.543	−5.945	0.156	− 0.001	0.064	−16.450
Fatigue	34.835	0.769	−0.631	0.004	0.054	15.793
Nausea/vomiting	7.393	3.556	−0.283	0.002	−0.058	3.455
Pain	8.274	−0.048	−0.020	0.001	0.040	20.817
Dyspnea	2.883	−4.231	−0.010	0.001	0.128	9.932
Insomnia	−4.711	8.358	0.588	−0.005	− 0.043	15.569
Appetite loss	15.318	9.242	−0.708	0.007	−0.128	7.158
Constipation	2.587	5.172	−0.064	0.001	−0.044	3.769
Diarrhea	6.984	3.574	−0.001	0.000	−0.095	4.532
Financial difficulties	6.042	0.449	−0.145	0.000	0.029	8.990

Coding is: sex (male = 0, female = 1), age in years (above 18), age by sex (age in years*sex); health conditions (no health conditions = 0, at least one health condition = 1); QoL quality of life