B-133 Uric acid: A description of the values found in adult patients treated during 2022 in a High Complexity Hospital

Background An association between uric acid and kidney disease, glucose intolerance, high blood pressure, metabolic syndrome and cardiovascular disease has been recognized. It is the obligation of the Clinical Laboratory to have valid reference intervals (RI) for this marker. Each particular population has genetics and a diet that represents it, which cannot be extrapolated in many cases. The difficulty and high cost of using direct methods for its establishment drive us to use the existing data in our electronic archive retrospectively. Objective: to describe the range of uric acid values in adult outpatients treated at the Posadas Hospital during the year 2022. Evaluate the influence of gender and age range on the observed values. Methods A retrospective observational approach was carried out from the System database Laboratory Informatics (SIL), Roche Infinity, from the year 2022. The data corresponding to all adult outpatient patients treated in the service were processed. Analytical System: Roche Cobas 6000, Uricase-Oxidase method. Exclusion criteria: oncology patients, kidney patients, diabetics, hyperglycemic patients, obstetric patients, hormonal patients, treated in wards and referred patients. Outliers excluded by Tukey method. The statistical treatment was carried out with the SPSS 17.0 program. Results We worked with 91922 data groups. Hence 12331 of uric acid. After meeting the exclusion criteria: 3899, of which 2289 (3.96 ± 1.05 mg/dl) correspond to women < 50 years , 747 (4.36 ± 1.15 mg/dl at ≥ 50 years and 863 (5.59 ± 1.33 mg/dl) men, all with normal distributions. Applying ANOVA and Student's test it was possible to verify in addition to the described significant difference between sexes, a difference between the 2 age groups of women (p<0.01) which is not equal to that of men in women ≥ 50 years of age. Conclusions A more extensive study is necessary to define own reference ranges that enable the early alarm guidelines, especially in the group of women < 50 years of age. This will allow an adequate evaluation of risk and evolution of patients. The application of Indirect Methods will make it possible to exclude values corresponding to underlying pathologies not registered in the SIL.