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Updated: Feb 10, 2026

Assessment and Communication for People with Disorders of Consciousness
Published on: August 1, 2017
Do Medical Complications Impact Long-Term Outcomes in Prolonged Disorders of Consciousness?
Anna Estraneo1, Vincenzo Loreto1, Orsola Masotta1
1Neurorehabilitation Unit and Research Laboratory for Disorder of Consciousness, IRCCS Maugeri ICS, Telese Terme (BN), Italy.
Objective:
To investigate medical complications (MCs) occurring within 6 months postinjury in brain-injured patients with prolonged disorders of consciousness (DoC) and to evaluate impact of MC on mortality and long-term clinical outcomes.
Design:
Prospective observational cohort study.
Setting:
Rehabilitation unit for acquired DoC.
Participants:
Patients (N=194) with DoC (142 in vegetative state [VS], 52 in minimally conscious state; traumatic etiology 43, anoxic 69, vascular 82) consecutively admitted to a neurorehabilitation unit within 1-3 months postonset.
Interventions:
Not applicable.
Main Outcome Measures:
Mortality and improvements in clinical diagnosis and functional disability level (assessed by Coma Recovery Scale-Revised [CRS-R] and Disability Rating Scale) at 12, 24, and 36 months postonset.
Results:
Within 6 months postinjury, 188 of 194 patients (>95%) developed at least 1 MC and 142 of them (73%) showed at least 1 severe MC. Respiratory and musculoskeletal-cutaneous MCs were the most frequent, followed by endocrino-metabolic abnormalities. Follow-up, complete in 189 of 194 patients, showed that male sex and endocrine-metabolic MCs were associated with higher risk of mortality at all timepoints. Old age, anoxic etiology, lower CRS-R total scores, and diagnosis of VS at study entry predicted no clinical and functional improvements at most timepoints; however, epilepsy predicted no improvement in diagnosis at 24 months postonset only.
Conclusions:
MCs are very frequent in patients with DoC within at least 6 months after brain injury, regardless of clinical diagnosis, etiology, and age. Endocrino-metabolic MCs are independent predictors of mortality at all timepoints; however,epilepsy predicted poor long-term outcome. Occurrence and severity of MCs in patients with DoC call for long-term appropriate levels of care after the postacute phase.
Insights
Medical complications are frequent in brain-injured patients with disorders of consciousness (DoC). Endocrino-metabolic complications predict mortality, while epilepsy indicates poor long-term outcomes, necessitating ongoing care.
Area of Science:
- Neurology
- Rehabilitation Medicine
- Critical Care Medicine
Background:
- Patients with prolonged disorders of consciousness (DoC) following brain injury are susceptible to medical complications (MCs).
- Understanding the incidence and impact of these MCs is crucial for patient management and prognostication.
Purpose of the Study:
- To investigate the medical complications (MCs) occurring within 6 months post-brain injury in patients with DoC.
- To evaluate the impact of these MCs on mortality and long-term clinical outcomes.
Main Methods:
- A prospective observational cohort study was conducted on 194 patients with DoC admitted to a neurorehabilitation unit.
- Data on medical complications, mortality, and functional status (using CRS-R and DRS) were collected at 12, 24, and 36 months post-onset.
Main Results:
- Over 95% of patients developed at least one MC within 6 months, with respiratory and musculoskeletal-cutaneous complications being most frequent.
- Male sex and endocrino-metabolic MCs were associated with increased mortality.
- Older age, anoxic etiology, lower CRS-R scores, and vegetative state diagnosis predicted poorer long-term functional outcomes.
Conclusions:
- Medical complications are highly prevalent in DoC patients within 6 months post-injury.
- Endocrino-metabolic MCs independently predict mortality, whereas epilepsy is linked to poor long-term outcomes.
- The frequent occurrence and severity of MCs underscore the need for sustained, appropriate care beyond the acute phase for DoC patients.
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