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Table 1 Demographics of participants and drop outs presented by number or mean followed by range or percentage in brackets

From: Effect of ultrasound training of physicians working in the prehospital setting

Variable Participants Drop-outs P
N = 40 N = 18
Gender – males 29 (72.5) 15 (71.4) 0.93
Years of medical experience 17.5 (14–24.5) 20.5 (15–27) 0.56
  Missing data: N = 0 Missing data: N = 3
Most common examination    0.87
 Vascular access 13 6  
 Nerve block 13 6
 Lung US 2 1
 EFAST 3 1
 FAST 3 0
 Cardiac US 1 0
  Missing data: N = 5 Missing data: N = 4
Prior US certification 16 (40.0) 11 (61.1) 0.14
  Missing data: N = 0 Missing data: N = 1
Prior US courses    0.30
 No 24 7  
 1–2 12 9
 >2 4 2
  Missing data: N = 0 Missing data: N = 0
US examinations prior to the course    0.26
 0–25 28 15  
 26–99 7 1
 >99 3 1
  Missing data: N = 2 Missing data: N = 1