Table 2.
Detectability of common bile duct stones according to stone size and stone type n (%)
| n | Detectable (n = 111) | Undetectable (n = 19) | P value | |
| Size (mm) | ||||
| < 3 | 9 | 4 (44) | 5 (56) | < 0.001 |
| 3–5 | 40 | 29 (74) | 11 (26) | |
| 6–10 | 45 | 43 (96) | 2 (4) | |
| 11–15 | 26 | 25 (96) | 1 (4) | |
| > 15 | 10 | 10 (100) | 0 (0) | |
| ≤ 5 | 49 | 33 (67) | 16 (33) | < 0.001 |
| > 5 | 81 | 78 (96) | 3 (4) | |
| Type | ||||
| Black pigment | 23 | 21 (91) | 2 (9) | < 0.001 |
| Mixed cholesterol | 38 | 36 (95) | 2 (5) | |
| Brown pigment | 60 | 54 (90) | 6 (10) | |
| Pure cholesterol | 9 | 0 (0) | 9 (100) | |
| Black or mixed | 61 | 57 (93) | 4 (7) | 0.023 |
| Brown or pure cholesterol | 69 | 54 (78) | 15 (22) |