Intensive care unit (ICU) patients are at risk of suffering from posttraumatic stress symptoms (PTSS) after ICU survival. To describe the prevalence of high levels of PTSS the first year after ICU admission. Further, to identify specific combinations of patient characteristics (latent classes based on pre-ICU data, demographics, and clinical characteristics), and to investigate possible associations among these classes and PTSS at 3, 6, and 12 months after ICU admission. Self-reported PTSS were measured with Impact of Event Scale-Revised (IES-R). PTSS and possible predictive factors (pre-ICU data, demographics, and clinical characteristics) were analyzed using descriptive statistics, latent class analysis, and linear mixed model for repeated measures. High PTSS levels (IES- ≥ 33) were reported by 14.9 % (95 % confidence interval [CI] [10.0; 21.1]), 16.7 % (95 % CI [11.5; 23.1]), and 18.4 % (95 % CI [12.9; 25.0]) of patients (sample 1, = 174) at 3, 6, and 12 months, respectively. Three latent classes were identified (sample 2, = 417). PTSS were significantly associated with class 2 (male with longer hospital stay) at 6 months and class 3 (age≥70, lower level of education, higher Simplified Acute Physiology Score, being mechanically ventilated) at all three measurement times. The prevalence of high levels of PTSS is the greatest 12 months after ICU admission. Health professionals can use this information to be aware of specific groups of ICU patients reporting PTSS during the first year and follow up on these.

中文翻译：

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一年随访期间与重症监护室幸存者创伤后应激症状相关的患者特征：一项多中心研究

重症监护室 (ICU) 患者在 ICU 存活后面临遭受创伤后应激症状 (PTSS) 的风险。描述进入 ICU 后第一年高水平 PTSS 的患病率。此外，确定患者特征的特定组合（基于 ICU 前数据、人口统计和临床特征的潜在类别），并调查这些类别与 ICU 入院后 3、6 和 12 个月时的 PTSS 之间可能的关联。自我报告的 PTSS 采用修订后的事件影响量表 (IES-R) 进行测量。使用描述性统计、潜在类别分析和重复测量的线性混合模型对 PTSS 和可能的预测因素（ICU 前数据、人口统计和临床特征）进行分析。高 PTSS 水平 (IES- ≥ 33) 的报告率为 14.9%（95% 置信区间 [CI][10.0;21.1]）、16.7%（95% CI [11.5;23.1]）和 18.4%（95% CI [10.0;21.1]）和 18.4%（95% CI [患者（样本 1，= 174）在第 3、6 和 12 个月时分别为 12.9；25.0]）。确定了三个潜在类别（样本 2，= 417）。PTSS 在 6 个月时与 2 级（住院时间较长的男性）显着相关，在所有三个测量时间与 3 级（年龄≥70 岁、教育水平较低、简化急性生理学评分较高、机械通气）显着相关。高水平 PTSS 的患病率在入住 ICU 后 12 个月达到最高。卫生专业人员可以利用这些信息来了解第一年报告 PTSS 的特定 ICU 患者群体，并对其进行跟进。