Table 2

Power study to determine number of patients needed in AIS group.

TXA

Amicar

Control


Blood loss

Standard Deviation

Blood Loss

Standard Deviation

Blood Loss

Standard Deviation

Sample Size Needed


Intra-op blood loss

1072 mL

+/- 425 mL

-

-

1420 mL

+/- 644 mL

58


Intra-op blood loss

1072 mL

+/- 425 mL

893 mL

+/- 220 mL

-

-

80


Total blood transfused

1253 mL

+/- 884 mL

-

-

1784 mL

+/- 733 mL

55


Total units transferred

-

-

1.2 U

+/- 1.1 U

2.2 U

+/- 1.3 U

34


Verma et al. BMC Surgery 2010 10:13   doi:10.1186/1471-2482-10-13

Open Data