Research Signal – Source date 2023-09-11
Before an older person undergoes noncardiac surgery, could a cognitive check taking five minutes or less identify who may need a closer assessment? The Detect CI study is designed to examine that practical question by comparing two brief screening approaches with a named cognitive assessment.
The study appears in a ClinicalTrials.gov registry entry dated September 11, 2023. The supplied registry description presents a prospective multicenter cohort based in Toronto. It describes planned assessments before surgery and follow-up during the hospital stay and at 30 and 90 days afterward. The entry provides a study design, not numerical findings about how well the checks perform.
What Detect CI plans to compare
The central comparison involves the Mini-Cog and the Ascertain Dementia 8-item Questionnaire, commonly called the AD8. Both are described as rapid tools intended for preoperative use, with an administration time of five minutes or less. Their performance is to be assessed against the Montreal Cognitive Assessment, or MoCA.
The planned measures are sensitivity, specificity, and area under the curve. In plain language, sensitivity asks how often a brief tool identifies people who meet the study’s cognitive-impairment criteria on the MoCA. Specificity asks how often it leaves unflagged people who do not meet those criteria. The area under the curve is a summary of how well a tool separates the two groups across possible decision thresholds.
That comparison could show how closely each brief approach aligns with the named assessment in this surgical population. It would not, by itself, turn a screening result into a definitive dementia diagnosis. Nor would it establish that one brief tool is better than the other unless the study produced and reported such results.
Why the flagged share depends on the assessment
Detect CI also asks a different question: how common is cognitive impairment when it is defined by each available approach? The planned prevalence assessment includes the AD8, Mini-Cog, MoCA, and a single cognitive question from the Centers for Disease Control and Prevention.
A prevalence figure is therefore not just a property of the patients. It is also tied to the method used to classify them. If two tools identify somewhat different people, the share of the study group counted as having impairment can vary even when the underlying group is the same. The meaning of that share depends on the assessment, its criteria, and the population being measured.
The described recruitment settings are surgical offices and pre-admission clinics at Toronto General Hospital, Toronto Western Hospital, and Mount Sinai Hospital in Toronto, Ontario. That scope matters. A proportion observed among older people preparing for noncardiac surgery at those sites should not automatically be read as an estimate for all older adults.
The plan extends beyond the preoperative comparison. It describes an assessment before surgery, a hospital-based postoperative assessment, and later checks at 30 and 90 days. These follow-ups are intended to compare patient-reported outcomes and clinical outcomes among participants classified with or without impairment by the screening approaches. The supplied material provides no results from those comparisons and no basis for claiming that screening improves complications, recovery, or other surgical outcomes.
What brief screening could change before surgery
If one of the brief checks shows useful performance in the relevant older surgical population, it could help preoperative teams identify which patients warrant fuller cognitive assessment during preparation for surgery. The practical value would depend on a suitable response to a positive screen, rather than on the short check acting as a diagnosis on its own.
For now, Detect CI supplies a structured way to test that possibility: compare rapid tools with the MoCA, examine how the chosen assessment changes the measured prevalence, and observe outcomes over time. It does not yet show that a five-minute check improves care. It defines the evidence needed to judge whether such a check could become a useful part of preoperative preparation.
Key Sources
- Primary source: Detect CI (Cognitive Impairment) Study
Government or Regulator · Clinical Trial · 2023-09-11
Keep exploring