Table 2.
Degree of accuracy of blood loss estimation for the 3 phases, with p-values for the association between phase 1 and phase 2, and phase 2 and phase
| |
Phase |
P value |
|||
|---|---|---|---|---|---|
| P1 MD (sd) | P2 MD (sd) | P3 MD (sd) | P1 vs P2 | P2 vs P3 | |
| Station 1 (200 ml) |
-45.2 (93.0) |
21.7 (89.5) |
37.7 (119.2) |
<0.0001 |
0.16 |
| Station 2 (225 ml) |
-5.2 (135.1) |
59.6 (115.9) |
49.2 (102.3) |
<0.0001 |
0.18 |
| Station 3 (250 ml) |
-80.0 (112.0) |
19.9 (97.5) |
27.6 (122.0) |
<0.0001 |
0.40 |
| Station 4 (500 ml) |
-115.0 (291.0) |
-42.1 (309.4) |
-52.4 (202.1) |
0.05 |
0.70 |
| Station 5 (550 ml) |
-196.6 (241.7) |
-44.1 (182.2) |
-18.0 (185.1) |
<0.0001 |
0.11 |
| Station 6 (550 ml) |
-183.7 (254.4) |
-65.7 (237.3) |
-38.6 (205.5) |
<0.0001 |
0.13 |
| Station 7 (700 ml) |
-227.4 (259.3) |
-57.9 (235.1) |
-14.2 (205.9) |
<0.0001 |
0.02 |
| Station 8 (900 ml) |
-313.3 (317.5) |
-42.9 (398.0) |
-29.9 (360.3) |
<0.0001 |
0.66 |
| Station 9 (1050 ml) |
-436.5 (505.4) |
-135.8 (352.3) |
-100.1 (342.6) |
<0.0001 |
0.18 |
| Station 10 (2000 ml) | -795.7 (729.6) | -227.1 (823.4) | -178.3 (634.2) | <0.0001 | 0.36 |
P = Phase.
P-value significant ≤ 0.05.
MD = Mean Difference.
sd = Standard deviation.
Stations were ordered in an ascending order of simulated blood loss volumes, although the sequence was random for the different phases conduction.