Table 1 Patient’s baseline clinical characteristics and subgroup analysis of clinical characteristics among patients with and without smoking before propensity score analysis
Characteristics | Overall | Smoking | P value | SMD | |
|---|---|---|---|---|---|
No | Yes | ||||
n | 252 | 164 | 88 | ||
Primary tumor type (%) | 0.005 | 0.448 | |||
 Slow | 69 (27.4) | 55 (33.5) | 14 (15.9) | ||
 Moderate | 89 (35.3) | 49 (29.9) | 40 (45.5) | ||
 Rapid | 94 (37.3) | 60 (36.6) | 34 (38.6) | ||
Age (years, median [IQR]) | 60.00 [53.00, 67.00] | 61.00 [53.00, 70.00] | 58.00 [52.75, 61.00] | 0.010 | 0.395 |
Gender (male/female, %) | 165/87 (65.5/34.5) | 81/83 (49.4/50.6) | 84/4 (95.5/4.5) | < 0.001 | 1.203 |
BMI (kg/m2, years, median [IQR]) | 24.14 [21.25, 26.44] | 24.01 [22.06, 25.99] | 24.37 [20.68, 27.02] | 0.627 | 0.196 |
Diabetes (no/yes, %) | 214/38 (84.9/15.1) | 140/24 (85.4/14.6) | 74/14 (84.1/15.9) | 0.932 | 0.035 |
Hypertension (no/yes, %) | 167/85 (66.3/33.7) | 117/47 (71.3/28.7) | 50/38 (56.8/43.2) | 0.029 | 0.306 |
Preoperative chemotherapy (no/yes, %) | 206/46 (81.7/18.3) | 136/28 (82.9/17.1) | 70/18 (79.5/20.5) | 0.623 | 0.087 |
Extra-vertebral bone metastasis (no/yes, %) | 134/118 (53.2/46.8) | 92/72 (56.1/43.9) | 42/46 (47.7/52.3) | 0.256 | 0.168 |
Visceral metastases (no/yes, %) | 191/61 (75.8/24.2) | 125/39 (76.2/23.8) | 66/22 (75.0/25.0) | 0.951 | 0.028 |
KPS (> 50/≤50, %) | 123/129 (48.8/51.2) | 77/87 (47.0/53.0) | 46/42 (52.3/47.7) | 0.501 | 0.107 |
Preoperative embolization (no/yes, %) | 233/19 (92.5/7.5) | 153/11 (93.3/6.7) | 80/8 (90.9/9.1) | 0.665 | 0.088 |
Surgical process (%) | 0.342 | 0.185 | |||
 Palliative decompression | 227 (90.1) | 149 (90.9) | 78 (88.6) | ||
 Partial resection of vertebrae | 14 (5.6) | 10 (6.1) | 4 (4.5) | ||
 En bloc resection of vertebrae | 11 (4.4) | 5 (3.0) | 6 (6.8) | ||
Surgical site (%) | 0.603 | 0.130 | |||
 Cervical and cervical thoracic | 13 (5.2) | 7 (4.3) | 6 (6.8) | ||
 Thoracic and thoracolumbar | 170 (67.5) | 110 (67.1) | 60 (68.2) | ||
 Lumbar and lumbosacral | 69 (27.4) | 47 (28.7) | 22 (25.0) | ||
Number of surgical segments (1/≧2, %) | 111/141 (44.0/56.0) | 75/89 (45.7/54.3) | 36/52 (40.9/59.1) | 0.547 | 0.097 |
Hypoalbuminemia (no/yes, %) | 219/33 (86.9/13.1) | 145/19 (88.4/11.6) | 74/14 (84.1/15.9) | 0.439 | 0.126 |
Thrombocytopenia (no/yes, %) | 245/7 (97.2/2.8) | 159/5 (97.0/3.0) | 86/2 (97.7/2.3) | 1.000 | 0.048 |
PT (< 12/≥12, %) | 198/54 (78.6/21.4) | 128/36 (78.0/22.0) | 70/18 (79.5/20.5) | 0.908 | 0.037 |
APTT (< 32/≥32, %) | 143/109 (56.7/43.3) | 101/63 (61.6/38.4) | 42/46 (47.7/52.3) | 0.047 | 0.281 |