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Table 2 Patient characteristics between systemic complication (+) and (−)

From: Risk factors related to perioperative systemic complications and mortality in elderly patients with osteoporotic vertebral fractures—analysis of a large national inpatient database

  Complication (−) (N = 1948) Complication (+) (N = 498) P value
Age (years)    0.012*
 65 to 74 627
(32.2%)
126
(25.3%)
 
 75 to 84 1094
(56.2%)
306
(61.4%)
 
 Over 85 227
(11.6%)
66
(13.3%)
 
Sex    0.06
 Male 469
(24.1%)
140
(28.1%)
 
 Female 1479
(75.9%)
358
(71.9%)
 
BMI (kg/m2)    0.16
 Less than 18.5 272
(14.0%)
76
(15.2%)
 
 18.5 to 22.9 871
(44.7%)
207
(41.6%)
 
 23.0 to 24.9 349
(17.9%)
78
(15.7%)
 
 25.0 to 29.9 322
(16.5%)
88
(17.7%)
 
 Over 30.0 51
(2.6%)
16
(3.2%)
 
 Unknown 83
(4.3%)
33
(6.6%)
 
Smoking index    0.82
 0 1899
(78.2%)
13
(72.2%)
 
 1 to 999 227
(9.4%)
2
(11.1%)
 
 Over 1000 302
(12.4%)
3
(16.7%)
 
Admission type    0.016*
 Scheduled 1122
(57.6%)
257
(51.6%)
 
 Unscheduled 826
(42.4%)
241
(48.4%)
 
Emergency transport    0.31
 Yes 311
(16.0%)
89
(17.9%)
 
 No 1637
(84.0%)
409
(82.1%)
 
Hospital type    0.46
 Academic 101
(5.2%)
30
(6.0%)
 
 Non-academic 1847
(94.8%)
468
(94.0%)
 
ADL score for admission (points)    < 0.001***
 0 to 10 780
(40.0%)
238
(47.8%)
 
 11 to 20 841
(43.2%)
165
(33.1%)
 
 Unknown 327
(16.8%)
95
(19.1%)
 
Surgical procedure    < 0.001***
 Anterior fusion 319
(16.4%)
116
(23.3%)
 
 Posterior fusion 1629
(83.6%)
382
(76.7%)
 
Preoperative comorbidities    
 Diabetes mellitus 270
(13.9%)
84
(16.9%)
0.09
 Cardiovascular disease 100
(5.1%)
36
(7.2%)
0.07
 Cardiac failure 60
(3.1%)
16
(3.2%)
0.88
 Atrial fibrillation 41
(2.1%)
22
(4.4%)
0.004**
 Hypertension 541
(27.8%)
150
(30.1%)
0.30
 Cerebrovascular disease 27
(1.4%)
7
(1.4%)
0.97
 Chronic obstructive pulmonary disease 8
(0.4%)
3
(0.6%)
0.57
 Pneumonia 6
(0.3%)
1
(0.2%)
0.69
 Renal failure 32
(1.6%)
17
(3.4%)
0.012*
 Hepatic failure 44
(2.3%)
17
(3.4%)
0.14
 Gastric ulcer and hemorrhage 75
(3.9%)
15
(3.0%)
0.38
 Malignancy 72
(3.7%)
18
(3.6%)
0.93
 Rheumatoid arthritis 74
(3.8%)
28
(5.6%)
0.07
 Dementia 39
(2.0%)
10
(2.0%)
0.99
 Depression 66
(3.4%)
16
(3.2%)
0.85
 Schizophrenia 33
(1.7%)
13
(2.6%)
0.18
  1. Significant values are given as follows: *P < 0.05, **P < 0.01, ***P < 0.001
  2. BMI body mass index, ADL activity of daily living