Variable | Univariate Analysis | Multivariate Analysis | ||||
---|---|---|---|---|---|---|
HR | 95% CI | P value | HR | 95% CI | P value | |
Nature of strictures | < 0.001 | < 0.001 | ||||
Benignant | 1(ref) | 1(ref) | ||||
Malignant | 2.558 | 1.617–4.046 | < 0.001 | 3.044 | 2.457–3.771 | < 0.001 |
M–S hydronephrosis | 0.017 | |||||
No | 1(ref) | |||||
Yes | 1.657 | 1.090–2.519 | 0.018 | |||
Urinary nitrite (NIT) | 0.020 | 0.041 | ||||
Negative | 1(ref) | 1(ref) | ||||
Positive | 2.146 | 1.195–3.853 | 0.011 | 1.915 | 1.489–2.461 | < 0.001 |
Urinary culture bacteria | 0.043 | |||||
Negative | 1(ref) | |||||
Positive | 1.882 | 1.064–3.327 | 0.030 | |||
CKD | 0.001 | 0.005 | ||||
1 | 1(ref) | < 0.001 | 1(ref) | |||
2 | 1.140 | 0.523–2.487 | 0.742 | 1.015 | 0.734–1.398 | 0.936 |
3 | 2.055 | 0.953–4.432 | 0.066 | 1.460 | 0.966–2.206 | 0.006 |
4 | 2.458 | 0.947–6.384 | 0.065 | 1.561 | 1.135–2.148 | 0.072 |
5 | 5.021 | 1.975–12.764 | 0.001 | 4.120 | 2.806–6.049 | < 0.001 |
Urine leukocyte | 0.035 | |||||
Negative | 1(ref) | |||||
Positive | 1.722 | 1.007–2.945 | 0.047 | |||
Approach | 0.028 | |||||
Retrgrade | 1(ref) | 0.028 | ||||
Antegrade | 2.414 | 0.981–5.941 | 0.055 | |||
Location of stenosis | 0.194 | |||||
Proximal | 1(ref) | 0.224 | ||||
Mid | 0.592 | 0.325–1.080 | 0.087 | |||
Distal | 0.854 | 0.535–1.363 | 0.508 | |||
Balloon size | 0.044 | 0.029 | ||||
F18 | 1(ref) | 0.035 | 1(ref) | |||
F21 | 0.677 | 0.235–1.953 | 0.471 | 0.943 | 0.606–1.469 | 0.796 |
F24 | 0.654 | 0.230–1.859 | 0.426 | 0.888 | 0.577–1.367 | 0.590 |
F30 | 1.273 | 0.448–3.613 | 0.650 | 1.814 | 1.164–2.827 | 0.008 |
Dilatation time | 0.026 | |||||
< 5 min | 1(ref) | 0.034 | ||||
5–10 min | 0.573 | 0.324–1.014 | 0.056 | |||
> 10 min | 1.340 | 0.802–2.239 | 0.263 | |||
Operation side per patient | 0.504 | |||||
Left | 1(ref) | |||||
Right | 0.873 | 0.586–1.301 | 0.504 | |||
Stent retention time | < 0.001 | < 0.001 | ||||
< 3 months | 1(ref) | < 0.001 | 1(ref) | |||
3–6 months | 0.996 | 0.584–1.700 | 0.989 | 1.13 | 0.902–1.416 | 0.289 |
> 6 months | 3.302 | 2.015–5.412 | < 0.001 | 3.043 | 2.455–3.772 | < 0.001 |
Stent retention number | 0.291 | |||||
1 | 1(ref) | |||||
2 | 1.243 | 0.829–1.864 | 0.293 |