Table 3.

Preanalytical mistakes in laboratory testing.

	Number	Number of	Number of
Division	of samples*	requested	preanalytical	Frequency (%)	(95% Cl)
		tests	mistakes
In-Patient	298,769	304,906	426	0.143	0.129–0.156
Out-Patient	441,268	457,013	622	0.141	0.130–0.152
Total	935,896	941,902	1,048	0.112	0.105–0.119

^* The number of requested tests were greater than the number of samples because more than one test could be performed on a sample.