Association of HLA class I variants with HIV-1 acquisition in multivariable models including only genetic variables or behavioral and biologic risk indicators.

Abbreviations are defined in Table 1. Associations are tested using Cox proportional hazards models. In model III, each level of positive risk score is compared to the level in the reference group with a neutral score (zero).

所有缩写的定义详见表1。采用Cox比例风险回归模型（Cox proportional hazards models）检验变量间的关联。在模型III中，将阳性风险评分的各个层级与参考组中评分为中性（即评分为0）的层级进行对比。