COMPARISON OF AUTOMATIC STARRSED RS ERYTHROCYTE SEDIMENTATION RATE WITH MANUAL WESTERGREN METHOD

Ninik Sukartini, Siskawati Suparmin

Abstract


This study aimed to compare the results of ESR measurements using Starrsed RS (30- and 60-minute mode) and manual Westergren method. We also investigate the effect of high leukocytes and haematocrit (Ht) on Starrsed RS ESR measurements. A cross-sectional study using K3EDTA anticoagulated blood samples from 140 subjects were conducted. A total of 21 samples with leukocytes count >50 000/µl were examined. The effect of Ht was studied using data from comparative study subjects.  The 60-minute mode Starrsed RS correlated very strongly [r = 0.98 (95%CI 0.97 to 0.98), p <0.0001], had good agreement [mean bias -0.4 mm (95%CI -1.46 to 0.74)], and gave no significant different results with manual Westergren method. The 30-minute mode Starrsed RS also has a very strong correlation [r = 0.97 (95%CI 0.96 to 0.98), p<0.0001] and good agreement [mean bias-2.9 mm (95%CI -4.23 to -1.58)], but has systematic difference with manual Westergren method. There was significant difference between manual method and Starrsed RS in samples with high leukocytes (p = 0.0208). There were no significant differences of ESR results measured by Starrsed RS dan manual Westergren method in the group of Ht≤35% and >35%. The ESR on the Starrsed RS should still be read at 60 minute. Leukocytes>50 000/µl may affect ESR measurements on Starrsed but no effect of haematocrit was observed.

Keywords


automated, ESR, Starrsed, Westergren

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DOI: http://dx.doi.org/10.24293/ijcpml.v25i3.1302

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