Fructosamine assay modified for the estimation of glycated hemoglobin.

CLINICAL CHEMISTRY, Vol. 35, No. 3, 1989 497 4#{176}C. For 12 additional patients (group B) the analysis was performed immediately and repeated 10 and 30 days after collection of the samples, which were stored at room temperature in airtight containers. The data were examined by Student’s paired t-test and linear-regression analysis. In neither group did storage conditions significantly influence the SCN measured two months (group A, t = 0.569, NS), 10 days (group B, t = 0.419, NS), or 30 days (group B, t = 0.01, NS) after sampling. Results of prompt and postponed analysis correlated well (Figure 1). In group B, culture of the samples confirmed in all cases the presence of polymicrobial flora normally present in oropharynx. We conclude that SCN is stable in saliva stored in airtight containers for as long as one month at room temperature or two months at 4 #{176}C-an dditional advantage for the largescale application of the test in epidemiological studies.