Overview of measures used for the study and the measurement time points
| Measure | Baseline | Preintervention | During intervention | Postintervention | Evaluation |
| Demographic data | X | ||||
| Cancer-related data | X | ||||
| VAS-social support | X | ||||
| Previous experiences with mindfulness and music for relaxation | X | ||||
| ASKU | X | ||||
| PHQ-4 | X | X | |||
| STAI-trait | X | ||||
| Salivary cortisol | X | X | |||
| STAI-state | X | X | |||
| PA-F-KF | X | X | |||
| MIDOS-2 | X | X | |||
| VAS-anxiety | X | X | |||
| VAS-relaxation | X | X | |||
| Heart rate | X | ||||
| Blood pressure | X | ||||
| VAS-tolerability of chemotherapy | X | ||||
| VAS-perceived duration of chemotherapy | X | ||||
| PSSUQ* | X | ||||
| VR-specific evaluation (self-developed)* | X | ||||
| Music-specific evaluation (self-developed)† | X |
*VR group only
†Music group only
ASKU, Short Scale for Measuring General Self-efficacy Beliefs; MIDOS-2, Minimal Documentation System version 2; PA-F-KF, Fear of Progression Questionnaire Short Form; PHQ-4, Patient Health Questionnaire-4; PSSUQ, Post-study System Usability Questionnaire; STAI, State-Trait Anxiety Inventory; VAS, Visual Analogue Scale; VR, virtual reality.