Table 1: Variability in hematological parameters from two different brands of K_{3}EDTA vacuum tubes. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

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^{
*}Normal distribution; the values were mean ± standard deviation (range: minimum-maximum); value represents the significance by paired Student’s -test.^{
**}Nonnormal distribution; the values were median ± standard deviation (5th–95th percentiles); value represents the significance by Wilcoxon ranked-pairs test.The bold values are statistically significant (), and bold mean % differences represent clinically significant variations, when compared with desirable bias [15]. NA: not available [15]. Tube I: 4.5 mL Labor Import lot 20100505 (concentration of K _{3}EDTA inside the tube is not made known by Shandong Weigao Group Medical Polymer, Weihai, China).Tube II: 1.2 mL S-Monovette lot 0092201 with 1.6 mg K _{3}EDTA (Sarstedt, Nümbrecht, Germany). |