Self-reported symptoms in ICU patients and their impact on long-term outcomes—a prospective multicenter study

Intensive Care Medicine, Published: 30 June 2025

Purpose

The aim was to identify possible associations between patient symptom subgroups, identified while in the ICU, adjusted for clinical and demographic variables and PICS outcomes, three months after ICU admission.

Methods

A prospective multi-center cohort study. Based on reported symptom prevalence in the ICU, patients were categorized into a Low, Middle or High symptom subgroup. PICS outcomes were measured using validated questionnaires (i.e., Katz Index; Cognitive Failure questionnaire, The Hospital Anxiety and Depression Scale, Impact of Event Scale) three months after ICU admission. Possible associations between ICU symptom subgroups and dichotomized PICS outcomes were modeled using conditional backward logistic regression.

Results

We included 175 patients with a median age of 62 years (interquartile range 49–70) and 65.1% were males. Three months after ICU admission, 23.5% had physical disability, 12.1% cognitive failure, 18.3% anxiety, 16.6% depression, and 16.7% post-traumatic stress. In multivariate analyses, patients in the High symptom subgroup compared to Low/Middle symptom subgroups had higher odds for worse outcomes in all PICS domains. The odds ratios (95%CI) were 3.31 (1.25–8.78) for physical disability, 3.56 (1.20–10.60) for cognitive failure, 3.70 (1.41–9.67) for anxiety, 4.74 (1.79–12.58) for depression and 4.38 (1.49–12.84) for post-traumatic stress, respectively.

Conclusion

A subgroup of patients with high symptom burden during ICU stay had worse physical, cognitive and mental health outcomes three months after ICU admission compared to patients with medium/low symptom burden. Future studies are needed to evaluate if early interventions in the ICU can reduce long-time burden in the PICS domains in ICU survivors.