The cumulative exposure durations of antiretroviral agents of the two study populations.

Note: The comorbidities include hypertension, diabetes mellitus, hyperlipidemia, coronary artery disease, chronic kidney disease (eGFR2), malignancy, osteoporosis, and chronic viral hepatitis.Abbreviations: d4T, stavudine; ddI, didanosine; ddC, deoxycytidine; NRTI, nucleoside reverse-transcriptase inhibitors; nNRTI, non-nucleoside reverse-transcriptase inhibitors; PI, protease inhibitor.备注：本数据集涵盖的合并症包括高血压、糖尿病（diabetes mellitus）、高脂血症、冠状动脉疾病、慢性肾脏病（eGFR2）、恶性肿瘤、骨质疏松症及慢性病毒性肝炎。 缩略语：d4T（司他夫定，stavudine）；ddI（去羟肌苷，didanosine）；ddC（脱氧胞苷，deoxycytidine）；NRTI（核苷类逆转录酶抑制剂，nucleoside reverse-transcriptase inhibitors）；nNRTI（非核苷类逆转录酶抑制剂，non-nucleoside reverse-transcriptase inhibitors）；PI（蛋白酶抑制剂，protease inhibitor）。