This prospective observational study investigates the impact of the anxiety-sleep disturbance symptom cluster on cellular immune function and quality of life in colorectal cancer (CRC) patients undergoing chemotherapy. The study aims to determine if patients with clinically significant anxiety and sleep disturbance exhibit poorer immune cell profiles (e.g., T-cells, NK cells) and lower quality of life compared to patients with no or low symptoms.
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CD4+ T-cell Count
Timeframe: Baseline
Global Health Status / Quality of Life Score
Timeframe: Baseline