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Table 1 Characteristics of the study population (N=89)

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

variables n Mean ± 1 SD Frequency (%)
Age (years)   30.2 ± 5.0  
Gravidity   2.9 ± 1.6  
Gestational age (days)   32.9 ± 16.2  
Laparoscopy    
   From outset 76   85.4
   Methotrexate failure 11   12.4
Laparotomy 2   2.2
Tubal rupture 36   40.4
Haemoperitoneum (mL)    
<60 21   23.6
[60–300] 20   22.5
[300–900] 37   41.6
≥ 900 11   12.3
  1. SD = standard deviation