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Table 1 Demographics, preoperative, and surgical characteristics of patients undergoing single-level spine percutaneous kyphoplasty

From: Spine surgeon specialty differences in single-level percutaneous kyphoplasty

Variable Orthopedic Surgeon Neurosurgeon P value †
Available Number (n = 2248) n = 1019 (45.3%) n = 1229 (54.7%)
Demographics
 Hospital status
  Outpatient 653 (64.1) 695 (56.6) < 0.001
  Inpatient 366 (35.9) 534 (43.4)
 Age Range, year
  64 or less 128 (12.6) 238 (19.4) < 0.001
  65–84 629 (61.7) 721 (58.7)
  85 or greater 262 (25.7) 270 (21.9)
 Sex
  Male 295 (29.0) 369 (30.0) 0.61
  Female 724 (71.0) 860 (70.0)
 Body mass index, kg/m2 (n = 2233)
  BMI ≤ 29.9 780 (77.5) 909 (74.0) 0.071
  BMI ≥30 228 (22.5) 318 (25.8)
 Race (n = 2132)
  Caucasian 887 (90.4) 1097 (89.3) < 0.001
  African American 19 (1.9) 32 (2.6)
 Asian 70 (7.1) 18 (1.5)
  Others 5 (0.5) 4 (0.3)
 Functional status (n = 2191)
  Independent 828 (81.2) 1090 (88.7) < 0.001
  Dependent 160 (15.7) 113 (9.2)
 Transfer status (n = 2245)
  Not transferred (admitted from home) 955 (93.8) 1156 (94.1) 0.689
  Transfer from other 63 (6.2) 71 (5.8)
 Diagnosis
  Pathologic fracture 584 (57.3) 618 (50.3) < 0.001
  Traumatic fracture 364 (35.7) 517 (42.1)
  Others 111 (10.9) 94 (7.6)
Preoperative Comorbidities
 Anemia 385 (37.8) 509 (41.4) 0.08
 Recent weight loss (> 10% of body weight in last 6 months) 13 (1.3) 19 (1.5) 0.59
 All diabetes mellitus
  Insulin-dependent diabetes 74 (7.3) 101 (8.2) 0.441
  Non-insulin-dependent diabetes 94 (9.2) 127 (10.3)
 Pulmonary
  Smoking (current smoker within 1 year) 121 (11.9) 157 (12.8) 0.519
  Dyspnea 121 (11.9) 163 (13.3) 0.069
  Chronic obstructive pulmonary disease 150 (14.7) 176 (14.3) 0.789
 Cardiovascular
  Hypertension requiring medicating 692 (67.9) 781 (63.5) 0.03
  Congestive heart failure 27 (2.6) 27 (2.2) 0.485
 Urinary system
  Acute renal failure 12 (1.2) 7 (0.6) 0.117
  Dialysis use 3 (0.3) 2 (0.2) 0.509
 Other system disease
  Disseminated cancer 29 (2.8) 86 (7) < 0.001
  Bleeding disorder 86 (8.4) 88 (7.2) 0.258
  Preoperative blood transfusion of ≥1 unit of packed/whole RBCs within 72 h of operation 11 (1.1) 10 (0.8) 0.514
  Steroid use for chronic condition 128 (12.6) 150 (12.2) 0.798
  Systemic sepsis 26 (2.6) 30 (2.4) 0.867
Operative variables
 Anatomic Level of Operation
  Thoracic Spine 476 (46.7) 611 (49.7) 0.156
  Lumbar Spine 543 (53.3) 618 (50.3)
 Wound classification
  Clean 1017 (99.8) 1227 (99.8) 0.851
  Clean/contaminated 2 (0.2) 1 (0.1)
  Contaminated 0 0
  Dirty/infected 0 1 (0.1)
 ASA classification (n = 2244)
  1-No Disturb 8 (0.8) 7 (0.6) 0.097
  2-Mild Disturb 264 (25.9) 287 (23.4)
  3-Severe Disturb 661 (64.9) 796 (64.8)
  4-Life Threat 84 (8.2) 136 (11.1)
  5-Moribund 0 1 (0.1)
 Type of anesthesia (n = 2247)
  General 921 (90.4) 1082 (88) 0.085
  All others 98 (9.6) 146 (11.9)
  Emergency case 18 (1.8) 46 (3.7) 0.005
  Operative time, mina 33.94 ± 40.99 35.95 ± 34.03 0.2041
 Discharge Destination (n = 2232)
  Home 823 (80.1) 1016 (82.7) 0.637
  Facility Which Not Home 176 (17.2) 206 (16.8)
  Days from Operation to Discharge, daya 1.30 ± 2.91 1.61 ± 4.55 0.06
  1. Data are reported as number (percentage) of patients except where noted. For variables with missing data, the number of available observations is given in brackets
  2. ASA American Society of Anesthesiologists, N number of patients, SD standard deviation, BMI body mass index
  3. aValues are presented as the mean and the standard deviation
  4. †Calculated using ANOVA for continuous variables and chi-square tests for categorical variables, differences were considered significant at p < 0.05, and these values are listed in bold type