Table 3 The correlation between the myometrium thickness grades and dark intraplacental bands volume to the estimated blood loss and the amount of red blood cell input

General blood loss (N = 25)

624.0 ± 156.2

0 (0,3.25)

5

1

8

242.85 (0, 4749.45)

Massive blood loss (N = 26)

1226.9.8 ± 172.1

4.0 (2.0,4.0)

11

10

14

4683.30 (0, 21,238.85)

Ex-Massive blood loss (N = 24)

2875.0 ± 1034.3

6.5 (4.0,9.5)

21

3

2

40,818.43 (19,281.72, 40,818.43)

P value

–

P < 0.001

P < 0.001

P = 0.007

Correlation to estimated blood loss (ml)

–

P < 0.001

ρ = 0.705

P < 0.001

ρ = − 0.604

P < 0.001, ρ = 0.653

Correlation to red blood cell input (u)

P < 0.001

rho = 0.705

–

P < 0.001

ρ = − 0.394

P < 0.001, ρ = 0.630