Table 5.
Variable | OR [95% CI] | P-value |
---|---|---|
Univariate | ||
Age > 63 years | 1.02 [0.46-2.24] | 0.965 |
Ankle brachial index > 0.66 | 1.13 [0.50-2.54] | 0.772 |
Diabetes mellitus | 1.22 [0.55-2.70] | 0.615 |
Hypertension | 1.85 [0.53-6.47] | 0.333 |
Hyperlipidemia | 1.12 [0.33-3.86] | 0.856 |
Smoking | 1.37 [0.58-3.22] | 0.469 |
Critical limb ischemia | 1.32 [0.54-3.24] | 0.536 |
Coronary artery disease | 1.55[0.61-3.96 | 0.352 |
Prior myocardial infarction | 1.70 [0.76-3.80] | 0.191 |
Congestive heart failure | 1.27 [0.50-3.27] | 0.611 |
Chronic kidney disease | 0.43 [0.10-1.88] | 0.260 |
Ostial SFA | 2.33 [0.95-5.76] | 0.065 |
Distal SFA | 0.44 [0.13-1.50] | 0.186 |
Popliteal | 1.06 [0.24-4.66] | 0.942 |
Lesion length >133 mm | 2.22 [0.99-5.01] | 0.054 |
Chronic total occlusion | 4.33 [1.27-14.75] | 0.019 |
In stent restenosis | 5.07 [1.91-13.48] | 0.001 |
Stent type | ||
Bare metal stents | 1.00 | --- |
Zilver PTX™ drug-coated stents | 1.48 [0.41-5.30] | 0.545 |
Viabahn™ stent graft | 3.72 [1.28-10.81] | 0.006 |
Supera™ mimetic stent | 1.94 [0.54-7.02] | 0.307 |
Stent length >180 mm | 2.01 [0.91-4.41] | 0.082 |
Multivariate | ||
Prior myocardial infarction | 1.85 [0.80-4.27] | 0.150 |
Chronic total occlusion | 3.46 [0.98-12.20] | 0.054 |
In stent restenosis | 5.30 [1.83-15.32] | 0.002 |
Stent type | ||
Bare metal stents | 1.00 | --- |
Zilver PTX™ drug-coated stents | 1.15 [0.31-4.23] | 0.710 |
Viabahn™ stent graft | 2.57 [0.82-5.05] | 0.105 |
Supera™ mimetic stent | 2.25 [0.60-8.37] | 0.224 |
Lesion length >130 mm | 1.86 [0.80-4.31] | 0.149 |
CI – confidence interval, OR – odds ratios, SFA – superficial femoral artery, OR – Odds Ratios, CI- Confidence Intervals
*For Dual antiplatelet therapy (DAPT) variable, while convergence criterion is met but a solution is questionable because a covariance (G) matrix is not positive.
Stepwise logistic regression used to allow a variable into the model with a significance level of 0.30 and 0.35 for a variable to stay in the model to select GLMM to predict ST. The final selected predictors were prior myocardial infarction, chronic total occlusion, in stent restenosis, stent types, and lesion length >130 mm, simultaneously. The Hosmer and Lemeshow goodness-of-fit test for the final selected model was χ2=8.638 (degree of freedom=7) p=0.2796. The model's fit statistics AIC=216.36.