Observational studyAnesthesiology2017
Poor Performance on a Preoperative Cognitive Screening Test Predicts Postoperative Complications in Older Orthopedic Surgical Patients.
Observational study in Anesthesiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 102 papers, 3 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Thiamine Intervention and Cognition in Older Adults Undergoing Coronary Artery Bypass Grafting - A Randomized Clinical Trial.
Reliability In Neurocognitive Telemedicine Screening (RING)
Who cites it
102 citing papers in PubMed, 3 syntheses or guidelines pooled it, 227 citations in OpenAlex.
- Cognitive Impairment and Postoperative Outcomes in Patients Undergoing Primary Total Hip Arthroplasty and Primary Total Knee Arthroplasty: A Systematic Review and Meta-analysis.Annals of African medicine · 2026Pooled it
- Study on the predictive model of delirium risk after surgery for elderly hip fractures based on meta-analysis.European geriatric medicine · 2025Pooled it
- Risk factors of postoperative delirium in the knee and hip replacement patients: a systematic review and meta-analysis.Journal of orthopaedic surgery and research · 2021Pooled it
- The Association of Preoperative Cognitive Dysfunction to Common Intraoperative Electroencephalographic Parameters and Cerebral Hypoxia During Cardiac Surgery.Anesthesia and analgesia · 2026Trial
- The prevention of delirium in elderly surgical patients with obstructive sleep apnea (PODESA): a randomized controlled trial.BMC anesthesiology · 2022Trial
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- Trial
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- Long-Term Cognitive and Functional Outcomes of Anesthesia and Surgery in Patients with Dementia.Healthcare (Basel, Switzerland) · 2026Review
- Impact of pre-operative dementia or cognitive impairment on outcomes after elective primary total shoulder arthroplasty.Journal of shoulder and elbow arthroplasty · 2026Article
- An Electronic Health Record-Integrated, Large Language Model-Powered Tool to Triage Surgical Patients.JAMA network open · 2026Article
- Perioperative Considerations for Orthopedic Surgery in a Geriatric Population.Federal practitioner : for the health care professionals of the VA, DoD, and PHS · 2026Review
- Development and validation of a post-operative delirium prediction model for patients undergoing abdominal surgery: a retrospective, observational, single-center study.Perioperative medicine (London, England) · 2026Article
- Feasibility of the Modified Telephone Interview for Cognitive Status (M-TICS) in the peri-operative environment.Anaesthesia · 2026Article
- Effects of Dementia on Adverse Outcomes in Geriatric Patients Undergoing Elective Total Hip Arthroplasty: Analysis of the US Nationwide Inpatient Sample.Geriatric orthopaedic surgery & rehabilitation · 2026Article
- Anxiety and depression in non-cardiac surgical patients and associations with adverse outcomes: A systematic review and meta-analysis.Journal of anesthesia and translational medicine · 2025Review
- Perioperative Artificial Intelligence Driven Integrated Modeling of Surgeries using Anesthetic, Physical and Cognitive Statuses for Predicting Hospital Outcomes.Research square · 2025Article
- Preoperative cognitive impairment predicts deep anaesthesia and higher postoperative pain in elderly patients: an observational study.BMC anesthesiology · 2025Observational
- Body Mass Index and Postsurgical Outcomes in Older Adults.JAMA network open · 2025Article
- Cognitive Impairment Before Cardiac Surgery: A Prospective Single-Center Observational Analysis.Journal of clinical medicine · 2025Article
42 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors at 1 institution in 2 countries.
Funding
Abstract
backgroundThe American College of Surgeons and the American Geriatrics Society have suggested that preoperative cognitive screening should be performed in older surgical patients. We hypothesized that unrecognized cognitive impairment in patients without a history of dementia is a risk factor for development of postoperative complications.
methodsWe enrolled 211 patients 65 yr of age or older without a diagnosis of dementia who were scheduled for an elective hip or knee replacement. Patients were cognitively screened preoperatively using the Mini-Cog and demographic, medical, functional, and emotional/social data were gathered using standard instruments or review of the medical record. Outcomes included discharge to place other than home (primary outcome), delirium, in-hospital medical complications, hospital length-of-stay, 30-day emergency room visits, and mortality. Data were analyzed using univariate and multivariate analyses.
resultsFifty of 211 (24%) patients screened positive for probable cognitive impairment (Mini-Cog less than or equal to 2). On age-adjusted multivariate analysis, patients with a Mini-Cog score less than or equal to 2 were more likely to be discharged to a place other than home (67% vs. 34%; odds ratio = 3.88, 95% CI = 1.58 to 9.55), develop postoperative delirium (21% vs. 7%; odds ratio = 4.52, 95% CI = 1.30 to 15.68), and have a longer hospital length of stay (hazard ratio = 0.63, 95% CI = 0.42 to 0.95) compared to those with a Mini-Cog score greater than 2.
conclusionsMany older elective orthopedic surgical patients have probable cognitive impairment preoperatively. Such impairment is associated with development of delirium postoperatively, a longer hospital stay, and lower likelihood of going home upon hospital discharge.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.