Statistical analysis results of ST-segment abnormalities and T wave abnormalities
| Clinical characteristics | Before chemotherapy (%) | During chemotherapy (%) | After chemotherapy (%) | P12 | P13 | P23 |
| ST-segment abnormalities | 16.95 | 25.42 | 34.75 | 0.111 | 0.002 | 0.118 |
| T wave abnormalities | 27.12 | 26.27 | 37.29 | 0.883 | 0.095 | 0.069 |
P12, P13 and P23 represent the calculation results of corresponding tests for indicators before and during chemotherapy, before and after chemotherapy, and during and after chemotherapy, respectively.