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Table 3 Multivariate logistic regression analyses of risk factors associated with conversion of MAC to GA

From: Analysis of urgent/emergent conversions from monitored anesthesia care to general anesthesia with airway instrumentation

Patient and Procedure Characteristics

OR (95% CI)

p-valuea

Age (years)

 < 35

Reference

 

 35–65

0.98 (0.79–1.21)

0.84

 66–75

0.88 (0.68–1.13)

0.31

 76–85

0.94 (0.71–1.24)

0.64

 > 85

0.98 (0.67–1.44)

0.93

BMI (kg/m2)

 18–25

Reference

 

 < 18

1.15 (0.78–1.70)

0.48

 26–30

1.34 (1.14–1.57)

< 0.001

 31–35

1.49 (1.22–1.81)

< 0.001

 > 35

1.74 (1.39–2.17)

< 0.001

 Missing

1.90 (1.48–2.47)

< 0.001

Sex

 Male

Reference

 

 Female

0.73 (0.64–0.84)

< 0.001

ASA-PS

 1

Reference

 

 2

1.20 (0.97–1.48)

0.09

 3

1.36 (1.08–1.72)

0.01

 4

1.64 (1.20–2.22)

< 0.001

 5

4.04 (0.97–16.85)

0.06

Care Team

 Attending

Reference

 

 Attending with CRNA

2.03 (1.59–2.58)

< 0.001

 Attending with resident

1.84 (1.48–2.29)

< 0.001

Surgical subspecialty

 Other surgical subspecialtiesb

Reference

 

 Oral maxillofacial surgery

7.96 (3.74–16.96)

< 0.001

 Otorhinolaryngology

6.88 (4.99–9.48)

< 0.001

 Gynecology

5.52 (3.73–8.17)

< 0.001

 Cardio-thoracic

2.85 (0.90–9.02)

0.07

 General surgery

2.71 (2.14–3.42)

< 0.001

 Urology

2.50 (1.86–3.37)

< 0.001

 Vascular

2.17 (1.69–2.79)

< 0.001

  1. Abbreviations: OR Odds-ratio, CI Confidence interval, BMI Body mass index, ASA-PS American Society for Anesthesiology Physical Status Classification, CRNA Certified registered nurse anesthetist
  2. ap-values based on multivariable logistic regression
  3. bcardiology, colorectal, gastroenterology, ophthalmology, orthopedics, other, unknown.