Postoperative atrial fibrillation following cardiac surgery in severe obesity: the added value of waist circumference
Main finding · POAFResult — go to the resultAdjusted relative risk 1.52 95% CI 1.36–1.72Authors' conclusion
Severe obesity increases the risk of POAF after CABG surgery. In this subgroup, elevated WC may provide additional prognostic value independently of BMI. Since POAF is associated with adverse long-term outcomes, abdominal obesity by measurement of WC should be assessed and targeted even in patient with severe obesity. Central Illustration Increasing waist circumference associated with increased atrial fibrillation risk post coronary artery bypass grafting. Bar graph of the unadjusted absolute risk and 95% confidence interval of postoperative atrial fibrillation for each tertile of waist circumference per body mass index category. Comparison of postoperative atrial fibrillation risk with chi-square test showing an increasing risk of postoperative atrial fibrillation related to increasing waist circumference within each body mass index category.
Study context
- Population
- Patients undergoing coronary artery bypass grafting (CABG) surgery (2006–19); severe obesity: BMI 38.5 ± 3.6 kg/m², waist circumference (WC) 123.4 ± 10.8 cm
- Participants
- 7,995 patients
- Exposure
- Severe obesity vs normal BMI; WC categories
- Severe obesityn = 763
- Outcome
- POAF after CABG surgery
Main finding
POAF
Adjusted relative risk
1.52
95% CI 1.36–1.72
P < 0.01
By group
As reported in the abstract
Observational data: associations, not effects.
Further findings
| Outcome | aRR (95% CI) | P value | |
|---|---|---|---|
| POAF per 10 cm increment in WC, BMI ≥35 kg/m² | 1.16 (1.08–1.24) | P < 0.01 | |
| 0.512Adjusted relative risk (log scale) |
Postoperative atrial fibrillation (POAF) by WC tertile within each BMI category
- Risk of POAF higher per increasing tertile of WC within each BMI category
- P < 0.05
Hospital LOS
- POAF in severe obesity associated with increased hospital LOS
Original publication
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