Multivariate Cox regression analysis of effect elevated arsenic water levels (> = 10 μg/L) on risk of the outcomes of all-cause and VL related mortality in a cohort of SSG treated patients.

HR = Hazard Ratio; CI = Confidence Interval
* Two time varying covariates were fitted in the model as the effect of arsenic exposure on mortality was found to vary with time
Multivariate Cox regression analysis of effect elevated arsenic water levels (> = 10 μg/L) on risk of the outcomes of all-cause and VL related mortality in a cohort of SSG treated patients.

HR即风险比（Hazard Ratio），CI即置信区间（Confidence Interval）。
* 鉴于砷暴露对死亡率的影响随时间发生变化，故在模型中纳入了两个时变协变量（time varying covariates）。
本研究针对接受SSG治疗的患者队列，开展了饮用水砷水平升高（≥10μg/L）对全因死亡率及VL相关死亡风险影响的多变量Cox回归分析。