Table 2. Univariate and multivariate logistic analyses for POAF in HCM patients who underwent myectomy without preoperative AF.
| Variables | OR | 95% CI for OR | p value | |
|---|---|---|---|---|
| Univariate | LAV (10 ml increment) | 1.121 | 1.057–1.190 | <0.001 |
| LAEF (10% increment) | 0.802 | 0.614–1.046 | 0.104 | |
| Age (>50y) | 4.234 | 2.136–8.393 | <0.001 | |
| NYHA function III/IV | 0.957 | 0.444–2.062 | 0.910 | |
| Female gender | 0.844 | 0.435–1.638 | 0.616 | |
| Hypertension | 2.932 | 1.311–6.558 | 0.009 | |
| Diabetes | 1.281 | 0.328–4.997 | 0.722 | |
| Concomitant procedure | 1.237 | 0.645–2.371 | 0.521 | |
| BMI (kg/m2) | 1.044 | 0.949–1.148 | 0.376 | |
| Residual moderate or severe MR | 0.503 | 0.105–2.409 | 0.390 | |
| Multivariate | Hypertension | 2.754 | 1.262–6.007 | 0.011 |
| Age (>50y) | 4.326 | 2.248–8.325 | <0.001 | |
| LAV (10 ml increment) | 1.137 | 1.075–1.202 | <0.001 | |
Because of the significant interaction between LAV and LAD, we did not include LAD in the analysis in order to address collinearity. AF: atrial fibrillation; BMI: body mass index; CI: confidence interval; HCM: hypertrophic cardiomyopathy; LAD: left atrium diameter; LAEF: left atrium ejection fraction; LAV: left atrium volume; MR: mitral regurgitation; NYHA: New York Heart Association; OR: odds ratio; POAF: postoperative atrial fibrillation