Table 1 Characteristics of the patients.

Values are expressed as percentages or as median [25th to 75th percentile]. ACEI, angiotensin-converting enzyme inhibitor; ARA, angiotensin II receptor antagonist; BB, beta blocker; CI, calcium channel inhibitor.

VariableCases (n = 86)Controls (n = 86)P
Female gender62%62%1*
Age (years)57 [40;66]58 [42;66]0.66†
Previous general
anesthesia
84%87%0.66*
Medication (ACEI/
ARA/BB/CI)
38%29%<0.0001*
History of allergy
  Drugs13%13%1*
  Latex2%8%0.17*
  Food7%0%0.03*
  Hymenoptera venom3%0%0.09*
  Pollen/moth/
animals/mold
15%13%0.83*
Asthma12%5%0.16*
Atopy21%19%0.85*
Type of surgery
  Cardiothoracic,
vascular
20%20%1*
  Maxillofacial8%8%1*
  Orthopedic
neurosurgery
20%20%1*
  Visceral, urologic,
gynecologic
52%52%1*
Scheduled surgery92%98%0.17*
Surgery with a context
of infection
2.3%2.3%1*
NMBA used during surgery
  Suxamethonium56%56%1*
  Atracurium51%51%1*
  Rocuronium3%3%1*

*Fisher’s exact test.

†Student’s t test.