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Table 3 Factors associated with subsequent survival/mortality in patients who survived more than 2 years after surgery

From: Factors affecting postoperative mortality of patients with insufficient union following osteoporotic vertebral fractures and impact of preoperative serum albumin on mortality

Characteristic Died (n = 19) Survived (n = 56) p-value Power
Male gender, n (%) 11 (57.9) 16 (28.6) 0.029* 0.48
Age, years 79.1 (7.6) 75.6 (8.0) 0.10 0.38
BMI, kg/m2 21.3 (3.1) 22.5 (3.0) 0.15 0.31
LVEF, % 70.3 (9.6) 71.9 (14.1) 0.65 0.078
Serum albumin, g/dL 3.4 (0.5) 3.9 (0.5) 0.0016* 0.96
BNP, pg/mL 45.3 (36.4) 44.9 (47.2) 0.98 0.050
CCr, mL/min 49.9 (20.1) 63.1 (21.6) 0.021* 0.65
BMD, %YAM 63.4 (14.0) 66.8 (13.4) 0.47 0.15
Follow-up, months 57.1 (21.2) 66.4 (25.3) 0.13 0.32
Time from original injury to surgery, months 4.4 (2.1) 4.6 (0.49) 0.21 0.090
Type of Denis’s classification (A/B.C) 12/7 34/21 0.72  
Surgical procedures    0.087  
 VP (HA) + PF 11 (57.9) 27 (48.2)   
 BKP 2 (10.5) 16 (28.6)   
 ADF + PF 6 (31.6) 13 (23.2)   
ASA classification ≥3 7 (36.8) 6 (10.7) 0.016*  
Modified Frankel classification
 C versus D or E 8 (47.1) 21 (38.2) 0.58  
 Estimated blood loss, ml 168 (155) 335 (499) 0.11  
 Operative time, min 162 (98.9) 201 (114.3) 0.13  
  1. p value for Fisher’s exact test or Student’s t test
  2. *P < 0.05 in the comparison between groups
  3. Variables are presented as mean (standard deviation) unless noted otherwise
  4. ADF anterior spinal decompression and fusion, ASA American Society of Anesthesiologists, BMD bone mass density, BKP balloon kyphoplasty, n number in group, BMI body mass index, BNP B-type natriuretic peptide, CCr creatinine clearance, HA hydroxyapatite, LVEF left ventricular ejection fraction, PF posterior fixation, VP vertebroplasty, YAM young adult male