Model update results for 2004–2011 data, including baseline characteristics and results of univariable and multivariable analysis.

a: p-value in univariable analysis by student's t test, Mann-Whitney U test or Chi-square where appropriate.b: Results of the multivariable analysis are after bootstrapping (shrinkage factor 0.79). The intercept of the model was estimated at –6.615.c: In the multivariable analysis, all CRP values were divided by factor 10.d: In the multivariable analysis, CSF leukocytes were log transformed.e: Culture results corrected for contamination with skin flora; if no antibiotics were started, culture was classified as negative.Abbreviations: CRP – C-reactive protein; CSF – cerebrospinal fluid; DRM – Drain-related meningitis; EVD – external ventricular drain; OR – Odd's ratio.a: 经酌情选用的学生t检验（Student's t test）、曼-惠特尼U检验（Mann-Whitney U test）或卡方检验（Chi-square test）完成单变量分析所得的p值。 b: 多变量分析结果经自助法（Bootstrap）校正，收缩因子为0.79；模型截距的估算值为–6.615。 c: 多变量分析中，所有C反应蛋白（C-reactive protein）的检测值均除以因子10。 d: 多变量分析中，脑脊液（cerebrospinal fluid, CSF）白细胞计数经对数转换处理。 e: 已针对皮肤菌群污染完成校正的培养结果；若未使用任何抗生素，则将该培养结果归类为阴性。 缩写说明：CRP – C反应蛋白（C-reactive protein）；CSF – 脑脊液（cerebrospinal fluid）；DRM – 引流相关性脑膜炎（Drain-related meningitis）；EVD – 脑室外引流（external ventricular drain）；OR – 比值比（Odd's ratio）。