Characteristics of patients recruited to study.

The median and range (lowest-highest) is shown for each group. APACHE II and CPIS are only applicable to the ventilated patients. Some variables are presented as percentages. Statistically significant differences between the groups were determined using the Mann-Whitney U test with post-hoc Dunn correction and are indicated as follows: VAP versus NVC (p†. CPIS = Clinical Pulmonary Infection Score. APACHE II = Acute Physiology and Chronic Health Evaluation II score. VAP = ventilator-associated pneumonia. NVC = non-ventilated control. Non-VAP = ventilated non-pulmonary infected control. CXR = Chest X-ray. WCC = White cell count. CRP = C-reactive protein.Characteristics of patients recruited to study.

各组均报告了中位数及极差（最小值至最大值）。APACHE II与CPIS仅适用于机械通气患者。部分变量以百分比形式呈现。组间的统计学显著性差异采用曼-惠特尼U检验结合事后Dunn校正进行分析，标注规则如下：VAP与NVC的比较（p†）。其中，CPIS即临床肺部感染评分（Clinical Pulmonary Infection Score），APACHE II即急性生理学与慢性健康状况评分II（Acute Physiology and Chronic Health Evaluation II score），VAP即呼吸机相关性肺炎（ventilator-associated pneumonia），NVC即非通气对照组（non-ventilated control），Non-VAP为呼吸机相关非肺部感染对照组，CXR为胸部X线检查（Chest X-ray），WCC为白细胞计数（White cell count），CRP为C反应蛋白（C-reactive protein）。本研究纳入患者的临床特征如下。