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Average values for serum and bile CEA obtained from patients operated for colorectal carcinoma
| Variables | Average(ng/ml) | S.D. | Minimum(ng/ml) | Maximum(ng/ml) | n |
| Serum CEA | 8.5 | 18.7 | 0.1 | 111.0 | 44 |
| Bile CEA | 74.5 | 13 ± 0.26 | 0.2 | 57 ± 1.0 | 44 |
Wilcoxon (Z) = -4.614, P < 0.0001 (Serum CEA vs Bile CEA), Notes: S.D. = standard deviation.
