Ultrasound Measured Depth of Pelvic Free Fluid Correlates Well with Blood Loss Volume in Patients with Ectopic Pregnancy

Table 2

Prediction model of haemorrhage volume by depth, BMI, and age.

Models	OR (95% CI)	value
Model 1
Hemorrhage∼β0 + β1depth^a	2.6 (1.7 to 4.1)	<0.001
Depth
Model 2
Hemorrhage∼β0 + β1depth + β2BMI^b	2.8 (1.8 to 4.5)	<0.001
Depth
BMI	1.1 (1.0 to 1.2)	0.275
Model 3
Haemorrhage∼β0 + β1depth + β2BMI + β3age	<0.001
Depth	2.9 (1.8 to 4.6)
BMI	1.1 (1.0 to 1.2)	0.243
Age	1.0 (0.9 to 1.1)	0.344

a: depth: the standardised depths measured by transvaginal ultrasound scan and transabdominal ultrasound scan; b: BMI, body mass index.