Table 4.

The precision of the in vitro angiogenesis assay. Maximal variation in the angiogenesis assay was tested with positive and negative controls (Two pairs of microscopic analyst–technician performing each one 48-well plate of negative control and one 48-well plate of positive control).

	Criteria	Technician 1–microscopic analyst 1	Technician 1–microscopic analyst 2	Technician 2–microscopic analyst 1	Technician 2–microscopic analyst 2
Positive control (mean)	≥5.75	6.354	6.771	6.896	6.958
Negative control	0	0	0	0	0
Variation (CV%)	≤15	7.61	6.27	6.85	7.82

CV%, coefficient of variation (%).