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Table 1 Comparison of baseline characteristics between prior bariatric surgery and morbid obesity in diabetes mellitus patients undergoing major noncardiac surgery

From: Prior bariatric surgery and perioperative cardiovascular outcomes following noncardiac surgery in patients with type 2 diabetes mellitus: hint from National Inpatient Sample Database

Variables Morbid obesity
(N = 1,407,818, %)
Prior-BS
(N = 119,002, %)
P-value
Mean age (SE) 57.06 (0.08) 56.65 (0.09) < 0.0001
Female 903,144 (64.15) 85,722 (72.03) < 0.0001
Race < 0.0001
 White 900,133 (63.94) 82,259 (69.12)  
 Black 188,572 (13.39) 12,648 (10.63)  
 Hispanic 108,798 (7.73) 7263 (6.10)  
 Other 49,465 (3.51) 3353 (2.82)  
 Missing 160,850 (11.43) 13,478 (11.33)  
Elective surgery 880,610 (62.55) 70,994 (59.66) < 0.0001
Smoking 299,815 (21.30) 27,403 (23.03) < 0.0001
Alcohol abuse 13,173 (0.94) 1358 (1.14) 0.0043
Drug abuse 14,596 (1.04) 1341 (1.13) 0.2402
Dyslipidemia 184,342 (13.09) 11,594 (9.74) < 0.0001
Hypertension 1,120,839 (79.62) 86,518 (72.70) < 0.0001
Coronary artery disease 250,654 (17.80) 18,493 (15.54) < 0.0001
End stage renal disease 211,300 (15.01) 11,105 (9.33) < 0.0001
Congestive heart failure 156,748 (11.13) 6434 (5.41) < 0.0001
Chronic lung disease 353,349 (25.10) 24,857 (20.89) < 0.0001
Chronic liver disease 83,095 (5.90) 4083 (3.43) < 0.0001
Peripheral vascular disorders 102,994 (7.32) 5490 (4.61) < 0.0001
Malignancy 28,561 (2.03) 1814 (1.52) < 0.0001
Anemia 255,997 (18.18) 24,276 (20.40) < 0.0001
Valvular disease 40,325 (2.86) 3047 (2.56) 0.0068
Prior venous thromboembolism 62,459 (4.44) 7368 (6.19) < 0.0001
Prior transient ischemic attack/stroke 59,134 (4.20) 5422 (4.56) 0.0171
Prior myocardial infarction 65,683 (4.67) 5638 (4.74) 0.6295
Prior percutaneous coronary intervention 62,215 (4.42) 6625 (5.57) < 0.0001
Prior coronary artery bypass grafting 53,829 (3.82) 4827 (4.06) 0.1007
Uncontrolled diabetes mellitus 168,409 (11.96) 6070 (5.10) < 0.0001
Diabetes mellitus with complications 245,276 (17.42) 15,966 (13.42) < 0.0001
BMI categories
 BMI < 30 kg/m2 60,443 (50.79)  
 30 ≤ BMI < 40 kg/m2 19,862 (16.69)  
 BMI ≥ 40 kg/m2 1,407,818 (100) 38,697 (32.52)  
Surgery type < 0.0001
 General 582,299 (41.36) 44,587 (37.47)  
 Genitourinary 45,714 (3.25) 4260 (3.58)  
 Neurosurgery 44,539 (3.17) 4419 (3.72)  
 Orthopedic 502,649 (35.70) 48,709 (40.93)  
 Otolaryngology 8654 (0.61) 360 (0.30)  
 Skin/breast 93,878 (6.67) 8655 (7.27)  
 Thoracic 16,382 (1.17) 1140 (0.96)  
 Vascular 100,429 (7.13) 5104 (4.29)  
 Other 13,276 (0.94) 1767 (1.48)  
  1. SE standard error, BS bariatric surgery