Predisposing factors

Patients

Controls

Heredity

n: 113

37.5%

n: 1

0.8%

Joint hypermobility

n: 192

64%

n: 3

2.5%

Severe venous pooling

n: 216

64%

n: 18

15%

Emotional stress and pain

n: 185

61.5%

n: 22

18%

Drug treatment

n: 30

10%

n: 12

10%

Postprandial syncope

n: 26

8.6%

n: 0

0%

Fasting/ Dehydration

n: 29

9.6%

n: 4

3.3%

Neurological diseases

n: 7

2.3%

n: 0

0%

Prolonged standing

n: 18

6.0%

n: 0

0%

Military standing formation

n: 33

11%

n: 0

0%