Table S2. Duration of antiemetic usage in the patients using prophylactic antiemetics.
| Purpose | Time/duration | N (%) |
| Prophylactic therapy | 13,085 (89.9) | |
| For acute CINV prevention only | Day 1 of chemotherapy (≥1 day) | 13,085 (89.9) |
| For both acute and delayed CINV prevention | Day 1–Day 2 of chemotherapy (≥2 days) | 10,403 (71.5) |
| Day 1–Day 3 of chemotherapy (≥3 days) | 7,853 (54.0) | |
| Day 1–Day 4 or beyond of chemotherapy (≥4 days) | 6,985 (48.0) |
Abbreviation: CINV, chemotherapy-induced nausea and vomiting.