Final multi-level logistic regression model to assess factors associated with having any neurological features at time of first-ever pre-chelation VBLL.

*P-value from the Wald test of no association of the attribute with the outcome adjusted for the other variables in the model. VBLL = venous blood lead level. OR = odds ratio. (n = 972).* 该P值为校正模型中其余变量后，检验属性与结局无关联的沃尔德检验（Wald test）所得结果。VBLL即静脉血铅水平（venous blood lead level），OR为比值比（odds ratio），本数据集样本量为972。