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| Variables | Overall (N = 3,400) | |
|---|---|---|
| N | % | |
| Bile duct dilatation | ||
| At left liver lobe (LLL) | 153 | 4.5 |
| At right liver lobe (RLL) | 157 | 4.6 |
| At common bile duct (CBD) | 113 | 3.3 |
| Double-barrel shotgun sign | 200 | 5.9 |
| Any combined | 249 | 7.3 |
| Liver mass | 52 | 1.5 |
| Suspected CCA | 274 | 7.2 (5.4−9.6)* |
*Prevalence rate and 95% confidence interval were derived from logistic regression random-effect model (village as a random effect); N–number of observation.
