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Table 2 Characteristics and ultrasound findings according to the haemoperitoneum volume at surgery

From: Ultrasound assessment of haemoperitoneum in ectopic pregnancy: derivation of a prediction model

Variables Haemoperitoneum<300 ml N = 41 Haemoperitoneum≥300 ml N = 48 P value
  Mean ± 1 SD Mean ± 1 SD  
Age (year) 30.8 ± 5.5 29.7 ± 4.7 0.301*
Number of previous pregnancies 3.0 ± 1.8 2.9 ± 1.6 0.718*
Parity 1.2 ± 1.2 1.0 ± 0.9 0.400*
Gestional age (day) 34.7 ± 15.5 31.3 ± 16.9 0.336*
  No (%) No (%)  
Vaginal bleeding 33 (80.4) 30 (62.5) 0.063*
Spontaneous pelvic pain    
   Absent 7 (17.1) 0 (0)  
   Mild 13 (31.7) 4 (8.3) <0.001
   Moderate 12 (29.3) 19(39.6)  
   Severe 9 (21.9) 25 (52.1)  
  Mean ± 1 SD Mean ± 1 SD  
Systolic blood pressure (mmHg) 119.5 ± 11.7 113.3 ± 15.3 0.038*
Diastolic blood pressure (mmHg) 72.4 ± 8.9 66.7 ± 10.0 0.006*
Heart rate (pulse/mn) 83.8 ± 13.8 85.5 ± 12.3 0.530*
Serum hCG concentration (UI/L) 7412 ± 11667 3828 ± 6465 0.068*
Serum haemoglobin concentration (g/dl) 12.0 ± 1.2 10.5 ± 1.9 <0.001*
Volume of intraperitoneal fluid at TVUS No (%) No (%)  
   Absent 11 (26.8) 4 (8.3%)  
   ≤ Uterine isthmus 17 (41.5) 5 (10.4%) <0.001†
   Uterine body 10(24.4) 24(50.0%)  
   > Uterine fundus 3 (7.3) 15(31.3%)  
Clots present at TVUS 12 (29.3) 35 (72.9) <0.001†
Fluid around the ovary at TVUS 1 (2.4) 8 (16.7) 0.027†
Fluid in the vesico-uterine pouch at TVUS 5 (12.8) 5 (10.6) 0.753†
  Mean ± 1 SD Mean ± 1 SD  
Height of fluid in Pouch of Douglas (mm ± 1 SD)‡ 20.8 ± 10.2 26.5 ± 12.0 0.039*
Width of fluid in Pouch of Douglas (mm ± 1 SD)‡ 29.3 ± 25.9 50.8 ± 24.3 <0.001*
  1. SD = standard deviation. TVUS = transvaginal ultrasound examination
  2. * Student's t-test.
  3. † Chi square for heterogeneity.
  4. ‡ for one woman the measurement was not available.