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Table 1 Reproducibility data provided by the manufacturer at various concentration levels

From: Hookah smoking and cancer: carcinoembryonic antigen (CEA) levels in exclusive/ever hookah smokers

Intraassay precision1,2,3 Interassay precision1,2,3
  Mean Concentration (ng/ml) SD CV   Mean Concentration (ng/ml) SD CV
1 1.5 0.08 5.3% 1 3.9 0.26 6.7
2 3.0 0.14 4.7% 2 15 0.84 5.6
3 13 0.47 3.6% 3 60 3.2 5.3
4 56 2.4 4.3% 4 371 22 5.9
5 316 18 5.7%     
  1. 1. Beard DB, Haskell CM: Carcinoembryonic antigen in breast cancer. Am J Med 1986 Feb:80:241–245.
  2. 2. Begent R: The value of carcinoembryonic antigen measurement in clinical practice. Ann Clin Biochem 1984;21: 231–238.
  3. 3. 3. Begent R, Ruslin GJS: Tumour markers: from carcinoembryonic antigen to products of hybridoma technology. Cancer Surv 1989:8(1):107–121.
  4. (Source: manufacturer technical booklet. See SIEMENS in references list)