Correction
for Garde et al., Clin Chem 46 (4) 551-559.
Clinical Chemistry 47: 1877, 2001;
(Clinical Chemistry. 2001;47:1877.)
© 2001 American Association for Clinical Chemistry, Inc.
Erratum
In the article by A.H. Garde, Å.M. Hansen, L.T. Skovgaard, and J.M. Christensen entitled "Seasonal and Biological Variation of Blood Concentrations of Total Cholesterol, Dehydroepiandrosterone Sulfate, Hemoglobin A1c, IgA, Prolactin, and Free Testosterone in Healthy Women" (Clin Chem 2000;46:551-9), the values for CVid, CVim, CViy, and CVg were underestimated by a factor of 
2.5 because of a calculation error. Correspondingly, the CVa/CViy ratio was overestimated, and the relative prediction intervals were too narrow. The correct values for CVim, CViy, and CVg are as follows: 15%, 13%, and 12% for total cholesterol; 16%, 20%, and 49% for dehydroepiandrosterone sulfate (DHEA-S); 3.0%, 7.0%, and 7.5% for hemoglobin A1c(HbA1c)/total hemoglobin; 16%, 14%, and 30% for IgA; 40%, 58%, and 63% for prolactin; and 64%, 55%, and 68% for free testosterone. The correct values for CVid are 14% for DHEA-S, 5.7% for IgA, 55% for prolactin, and 19% for free testosterone. The correct CVa/CViy and relative prediction intervals are as follows: 0.13 and (43%, 234%) for total cholesterol; 0.26 and (27%, 368%) for DHEA-S; 0.26 and (63%, 158%) for HbA1c/total hemoglobin; 0.07 and (42%, 240%) for IgA; 0.05 and (3%, 3053%) for prolactin; and 0.13 and (4%, 2609%) for free testosterone. Please note this correction when referencing this article. The authors apologize for any inconvenience this error may have caused.
