Table 2 Baseline characteristics and univariate risk factor analysis of 194 patients with false-negative results
Influence factor | All patients (n = 194) | False negative (n = 32) | Univariate analysis, OR (95% CI) | p value |
|---|---|---|---|---|
Age (years) | 61 ± 9.29 | 63 ± 9.09 | 1.02 (0.98–1.06) | 0.36 |
Male (female) | 101 (93) | 16 (16) | 1.10 (0.52–2.36) | 0.80 |
Operator | ||||
Operator 1 | 83 | 12 | 1 | |
Operator 2 | 80 | 5 | 1.37 (0.60–3.13) | 0.46 |
Operator 3 | 31 | 15 | 1.14 (0.37–3.54) | 0.82 |
Puncture approach | ||||
Right side | 164 | 26 | 1 | |
Left side | 30 | 6 | 1.33 (0.50–3.56) | 0.58 |
Forcep times | 4.0 ± 1.28 | 4.0 ± 1.10 | 1.12 (0.84–1.50) | 0.45 |
BS part | ||||
Intrahepatic BS | 12 | 8 | 1 | |
Hilar BS | 54 | 2 | 0.87 (0.16–4.73) | 0.87 |
MEBS | 89 | 15 | 1.01 (0.20–5.10) | 0.99 |
DEBS | 39 | 7 | 1.09 (0.20–6.14) | 0.92 |
The length of BS | 2.9 ± 0.72 | 2.7 ± 0.80 | 1.30 (0.77–2.18) | 0.33 |
Imaging features | ||||
Eccentricity sigh | 69 | 5 | 1 | |
Truncation sign | 48 | 7 | 0.42 (0.14–1.24) | 0.12 |
Rat tail sign | 55 | 15 | 0.53 (0.20–1.40) | 0.20 |
Filling defect sign | 22 | 5 | 1.06 (0.34–3.34) | 0.92 |
Max. diameter at BS part | 2.5 ± 1.38 | 3.3 ± 1.28 | 1.56 (1.21–2.01) | 0.00* |
Tumor type | ||||
Cholangiocarcinoma | 123 | 19 | 1 | |
Non-cholangiocarcinoma tumors | 53 | 13 | 4.56 (2.04–10.19) | 0.00* |
Benign BS | 18 | 0 | 0.00 | 1.0 |