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Table 1 Patient characteristics and demographics identify risk of OSA based on modified STOP-Bang questionnaire

From: Modified STOP-Bang for predicting perioperative adverse events in the Thai population

Variable Low risk for OSA
(n = 210)
High risk for OSA
(n = 190)
P-value
Age (years), mean ± SD 47.3 ± 13.80 61.1 ± 12.6 < 0.001
Sex, n (%) < 0.001
• Male 31 (14.8%) 100 (52.6%)
• Female 179 (85.2%) 90 (47.4%)
BMI (kg/m2), mean ± SD 23.2 ± 3.6 26.8 ± 5.1 < 0.001
Preoperative oxygen saturation (%) 98.7 ± 1.6 98.0 ± 2.0 0.001
Underlying disease, n (%)
• Diabetes mellitus 20 (9.5%) 51 (26.8%) < 0.001
• Hypertension 41 (19.5%) 131 (68.9%) < 0.001
• Dyslipidemia 35 (16.7%) 54 (28.6%) < 0.001
• Coronary disease 1 (0.5%) 5 (2.6%) 0.077
• History of congestive heart failure 0 (0%) 1 (0.5%) 0.293
• History of arrythmia 4 (1.9%) 6 (3.2%) 0.423
• Pulmonary disease 5 (2.4%) 6 (3.2%) 0.72
• Renal disease 21 (10%) 24 (12.7%) 0.74
Operation type, n (%)
• Explore laparotomy 68 (32.4%) 46 (24.1%) 0.025
• Orthopedic surgery 37 (17.5%) 42 (22.3%)
• Laparoscopic surgery and endoscopic surgery 43 (20.3%) 46 (24.5%)
• Breast surgery, Excision or Repair hernia 44 (20.7%) 27 (19.9%)
• Others 20 (9.4%) 17 (9.0%)
Anesthetic technique and operation time
• GA, n (%) 132 (69.5%) 134 (63.8%) 0.032
• GA combined regional anesthesia, n (%) 18 (8.6%) 28 (14.7%) 0.054
o GA + Interscalene brachial plexus block 12 15  
o GA + Epidural analgesia 6 13  
• Spinal anesthesia, n (%) 40 (19.1%) 48 (25.3%) 0.134
• Operation Time, median (IQR) 160 (110–210) 165 (105–230) 0.646
Total fluid & Estimated blood loss
• Estimate blood loss (ml), median (IQR) 100 (20–250) 50 (20–300) 0.022
• Total IV fluid (ml), median (IQR) 1100 (650–1850) 1010 (700–2000) 0.463
• Blood component, n (%) 10 (4.8%) 8 (4.2%) 0.791
Post-operative outcomes
• Post-operative ICU admission, n (%) 5 (2.4%) 15 (7.9%) 0.007
• Post-operative unplanned ICU admission, n (%) 0 3 (1.6%) 0.106
• 30-days mortality, n (%) 0 0 N/A
• Length of hospital stay (days), median (IQR) 4 (3, 5) 4 (3, 6) 1.00
  1. GA General anesthesia, IQR Interquartile range, IV Intravenous fluid, Kg Kilogram, ML Milliliter, OSA Obstructive sleep apnea, SD Standard deviation