Table 4.

Correlation matrix used to define covariates

	Nausea	Vomiting	Diarrhoea	Weight loss	Appetite loss	Loss taste/smell
Age	− 0.04	− 0.03	− 0.14	0.02	0.04	0.01
Gender	− 0.33**	− 0.26**	0.12	− 0.03	− 0.22**	− 0.25**
BMI	0.00	− 0.05	0.01	− 0.20**	− 0.11	− 0.07
Time since diagnosis	− 0.06	− 0.01	0.07	0.06	0.05	0.19*
Smoking	0.02	0.20**	0.09	0.09	0.06	− 0.11
Vit.D	0.13	0.09	− 0.14	0.19*	0.11	0.07
Vit.K	0.07	0.06	− 0.12	0.08	0.08	0.06
Antacid	0.10	0.01	− 0.14	0.27**	0.18*	0.19*
Multivit	0.02	− 0.06	− 0.11	− 0.11	− 0.06	− 0.01
Oxygen use	0.04	0.08	0.08	− 0.07	− 0.07	− 0.03

If a p value was lower than 0.05, the covariate was included

^*p < 0.05; **p < 0.01