Behavioral Fluctuation in Disorders of Consciousness: A Retrospective Analysis.
Alice Barra, Yelena G Bodien, Can Ozan Tan and 3 others
PMID 40139629WHAT IT FOUND
In patients with prolonged disorders of consciousness, CRS-R scores fluctuated frequently.
A 1-point change was common without treatment. Motor behaviors were the most stable signs of consciousness, while language behaviors were the least stable. Serial assessment over 21 days is essential to distinguish spontaneous fluctuation from true clinical change.
Key findings
01Behavioral fluctuation was observed in 83% of patients on the Motor subscale and 54% on the Communication subscale across six consecutive assessments.
02Among patients initially diagnosed as conscious, 25% failed to demonstrate consciousness on at least one subsequent assessment.
03Motor behaviors such as localization to pain were the most stable signs of consciousness, recurring in at least 97% of the sample, whereas language-related behaviors were the least stable, recurring in no more than 27%.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study could not control for extraneous factors that influence consciousness, such as time of day, sedating medications, seizures, or sleep disturbance. The analysis included only patients 28 to 90 days post-injury, so the pattern of fluctuation in the acute or chronic phases may differ. The definition of fluctuation did not distinguish between true clinical change and measurement error or spontaneous variation. Small sample sizes for some specific behaviors prevented a comparative analysis of the stability of all individual signs of consciousness.
Declared interests
Two authors receive licensing royalties for the Coma Recovery Scale-Revised, the primary outcome measure used in the study. One author also receives honoraria for conducting training seminars on the scale.
The easy way to misread this
Do not interpret a 1-point change in a CRS-R subscale score as evidence of clinical improvement or decline. This study found that such changes are the norm and frequently occur without any treatment intervention, reflecting the base rate of spontaneous fluctuation.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →