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Diabetes Care, Vol 5, Issue 2 114-117, Copyright © 1982 by American Diabetes Association

ARTICLES

Causes of errors in diabetic urine testing by hospital personnel

ED Davis and EB Cox

Errors in urine testing were studied using 119 health professionals who tested simulated urine specimens from six hypothetical patients. A record of the hypothetical patients' test results for 2 previous days accompanied each specimen. Five of the six records were loaded high or low to investigate testers' biases as a result of their knowledge of previous values. Testers demonstrated an aversion to extreme readings. At the lower concentration, 83% of erroneous readings were higher than the correct value. At the higher concentration, 70% of errors were below the true value. The results also revealed that readings were influenced by knowledge of past records. A higher reading for the sample with the biased-high record occurred 50% more often than a lower reading. Differences in error were nonsignificant for different educational levels and past experiences of the testers. Urine testing accuracy appears to be affected by a tendency toward avoidance of extremes and knowledge of previous results.
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Copyright © 1982 by the American Diabetes Association.