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Average values for serum and bile CEA obtained from patients operated for uncomplicated cholelithiasis
| Variables | Average (ng/ml) | S.D. | Minimum (ng/ml) | Maximum (ng/ml) | n |
| Serum CEA | 1.9 | 0.8 | 1.0 ng/ml | 3.5 ng/ml | 10 |
| Bile CEA | 1.2 | 0.9 | 0.3 ng/ml | 2.9 ng/ml | 10 |
Wilcoxon (Z) = -1.992, P < 0.46 (Serum CEA vs Bile CEA), Notes: S.D. = standard deviation.
