Model selection analyses for genetic diversity (d), rate of synonymous (dS) and non-synonymous substitutions, and selection pressures (dN/dS).

Model structures included children age (Age), ART experience (ART), CD4 count (both as % CD4 and as CD4/mm3), and viral load (VL). Best-ranked models are bolded and have the lowest AIC value.

模型结构包含儿童年龄（Age）、抗逆转录病毒治疗（Antiretroviral Therapy，ART）史、CD4计数（分为CD4百分比与每立方毫米CD4细胞数两种形式）以及病毒载量（VL）。排名最优的模型以加粗字体标注，且对应最低的赤池信息准则（Akaike Information Criterion，AIC）值。