P4755Sex differences in admission rates, use of anticoagulation, and outcomes for emergency department presentations of atrial fibrillation
Bibliographic record
Abstract
Abstract Background Studies in non-Emergency Department (ED) settings have shown women with non-valvular atrial fibrillation (NVAF) differ in presentation, treatment, and outcomes compared to men. Despite AF being a common reason for ED visit, little is known regarding sex differences in patients presenting to ED. Purpose We sought to determine whether sex differences exist in rates of admission among NVAF patients presenting to the ED and if oral anticoagulant (OAC) use and outcomes differ by ED discharge status. Methods Patients≥18 years old, presenting to the ED with incident NVAF in two western Canadian provinces (Alberta and British Columbia) from April 2012 to March 2015 were included. ED records were linked to hospital records to identify patients admitted to hospital versus discharged from the ED. Outcomes of interest were 30-day mortality and 1-year stroke, heart failure (HF) and mortality. Pharmaceutical claims were queried for OAC use within 90 days following NVAF ED event. Results Of 16,991 ED NVAF patients, 7,770 (46%) were women and 9,221 (54%) were men (p<0.001). Compared to men, women were older (73.9 vs 65.6 years, p<0.001) and presented with higher CHA2DS2-VASc scores (4.0 vs 2.0, p<0.001). Overall, 41% of women and 37% of men were admitted to hospital (p<0.001). OAC rate was 50% among admitted and 37% among discharged (p<0.001). OAC rates were 53% in women and 48% in men among admitted (p<0.001), and 39% in women and 35% in men among discharged (p<0.001). OAC rates were higher in patients with CHA2DS2-VASc ≥1 who were admitted (53% in women (n=2,781) and 52% in men (n=2,683), p=0.63) than in those who were discharged (39% in women (n=4,435) and 45% in men (n=3,866), p<0.01). Women had higher rates of mortality at 30-days and 1-year, and stroke at 1-year compared to men, irrespective of ED discharge status (all p<0.02). Women admitted had higher HF rates at 1-year compared to men (p=0.002). (Table) Outcomes by Sex and ED Discharge Status Outcome Discharged Admitted Women (N=4,560) Men (N=5,780) p-value Women (N=3,210) Men (N=3,441) p-value 30 Day Mortality, n (%) 63 (1.4) 50 (0.9) 0.01 261 (8.1) 228 (6.6) 0.019 1 Year Mortality, n (%) 270 (5.9) 248 (4.7) <0.001 717 (22.3) 604 (17.6) <0.001 Stroke*, rate (SE) 1.7 (0.19) 0.9 (0.13) <0.001 4.0 (0.37) 2.6 (0.28) 0.001 Heart Failure*, rate (SE) 3.6 (0.28) 3.1 (0.23) 0.16 12.9 (0.62) 10.4 (0.54) 0.002 *Censored on death. Conclusions In this population-based study of patients presenting to ED with NVAF, we found women were more likely to be admitted to hospital than men. Women had a worse prognosis than men, irrespective of ED discharge status. Use of OAC was suboptimal, regardless of patient sex. Acknowledgement/Funding Heart and Stroke Foundation of Canada, UBC Cardiology, Servier Alberta Innovation Health Fund
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".