Mikroskobik idrar analizini öngörmede idrar strip testinin performansı.

Objective: The aim of the study is to evaluate the performance of urine strip analysis for predicting manual microscopic urine analysis. Methods: Urine samples, which were ordered from patients with suspected urinary tract infection (UTI), and which were analyzed with both microscopic and strip analysis, were included in the study. Sensitivity, specificity, positive and negative likelihood ratios (LR +, LR-), pre- and post-test odds and post-test probability for cut-off values of "trace", "1+", "2+", "3+" of erythrocyte-strip (Eryth-S) and leucocyte-strip (Leuc-S) tests were calculated. Bayes theorem was used to determine conditional probability. Area under curve (AUC) of ROC was calculated. Results: The AUC for Leuc-S and Eryth-S was 0.923 and 0.975, respectively. The Leuc-S test in "1+" and Eryth-S test in "trace" cut-off value had adequate sensitivity and specificity (>80%). Leuc-S of "3+" and Eryth-S of all cut-off values for LR+ value; Leuc-S of "trace" and Eryth-S of "trace" and "1+" for LR- value were significantly different for posttest probability(<0,1). Periodic pre-test probability rate of UTI was calculated as 5.95%. According to the microscopic analysis, the post-test probability of UTI was 39% for Leuc-S "3+" and 74% for Eryth-S "3+". Conclusion: The urine strip analysis was found to be sufficient in predicting the positivity of leukocytes and erythrocytes in manual microscopic analysis. The diagnostic accuracy differs according to the estimation values in the urine strip analysis. We think that our study will provide awareness on this issue and will have an impact on determining test requests of physicians in patients with UTI and preventing unnecessary test requests. [ABSTRACT FROM AUTHOR]