Table 3. Univariate regression analysis of predictive factors for PTBD duration.
| Coeff(B) | Std Coeff(β) | 95% CI of B | P value | ||
|---|---|---|---|---|---|
| Lower | Upper | ||||
| PTBD tube size (8.5fr) | -2.57 | -0.10 | -7.42 | 2.28 | 0.296 |
| PTBD site (Rt.) | 2.49 | 0.15 | -0.70 | 5.69 | 0.124 |
| Previous EST | -2.50 | -0.17 | -5.36 | 0.36 | 0.086 |
| Number of stones | 0.16 | 0.05 | -0.31 | 0.64 | 0.496 |
| Long diameter of largest stone | 0.07 | 0.10 | -0.06 | 0.20 | 0.321 |
| Short diameter of largest stone | 0.19 | 0.19 | 0.00 | 0.38 | 0.056 |
| Volume of largest stone | 0.00 | 0.10 | 0.00 | 0.00 | 0.314 |
| Age | 0.02 | 0.04 | -0.09 | 0.13 | 0.712 |
| Sex (Male) | -0.19 | -0.01 | -2.68 | 2.30 | 0.881 |
| Diabetes mellitus | -0.34 | -0.02 | -3.38 | 2.71 | 0.827 |
| Severity of cholangitis | 1.26 | 0.13 | -0.22 | 2.74 | 0.094 |
| White blood cells count(x1000) | -0.05 | -0.04 | -0.26 | 0.17 | 0.666 |
| Total bilirubin | 0.68 | 0.33 | 0.29 | 1.06 | 0.001 |
| Creatinine | 0.25 | 0.02 | -2.04 | 2.55 | 0.828 |
| Platelet (x1000) | 0.00 | -0.07 | -0.02 | 0.01 | 0.388 |
| Prothrombin time (INR) | 3.79 | 0.10 | -1.79 | 9.36 | 0.182 |
| Amylase | 0.00 | -0.02 | 0.00 | 0.00 | 0.824 |
| Aspartate aminotransferase | 0.00 | -0.04 | -0.01 | 0.00 | 0.724 |
| Alanine aminotransferase | 0.00 | 0.03 | 0.00 | 0.01 | 0.753 |
| Alkaline phosphatase | 0.00 | 0.13 | 0.00 | 0.01 | 0.198 |
| γ-glutamyl transpeptidase | 0.00 | 0.05 | 0.00 | 0.01 | 0.597 |
| C-reactive protein | 0.04 | 0.06 | -0.10 | 0.19 | 0.568 |
Coeff = coefficient; Std Coeff = standard coefficient; CI = confidence interval.
PTBD = percutaneous transhepatic biliary drainage; EST = endoscopic sphincterotomy.