Table 1.

Summary of measurements.

Variables	Method of measurement	Frequency
Depressive symptoms	17-item Hamilton Rating Scale for Depression (HAM-D17)	Before and end of treatment
Gut microbiome	Stool samples for 16S rRNA sequencing	End of treatment
Age, gender, occupational status	Demographic form	Before treatment
Type of chemotherapy, tumor stage, number of treatments, body mass index, hemoglobin	Health form information gathered from their health record	Before treatment