| ASHR | Adjusted sub-distribution hazard ratio |
| ATC | Anatomical Therapeutic Chemical |
| CI | Confidence interval |
| ICD-9-CM | International Classification of Diseases, Ninth Revision, Clinical Modification |
| IDA | Iron-deficiency anemia |
| LDL | Low-density lipoprotein |
| NHI | National Health Insurance |
| NHIRD | National Health Insurance Research Database |
| PSM | Propensity score matching |
| SMD | sSandardized mean difference |
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