Table 2 Demographic data, medical history, laboratory data, and surgical-related data after propensity score matching
Variables | Group A | Group B | p-value |
|---|---|---|---|
N = 308 | N = 308 | ||
Demographic data | |||
Age | 72.38 ± 5.93 | 72.21 ± 5.57 | 0.716 |
Gender | 0.285 | ||
Female | 192 (62.3%) | 179 (58.1%) | |
Male | 116 (37.7%) | 129 (41.9%) | |
BMI | 25.05 ± 3.82 | 25.20 ± 3.64 | 0.609 |
Medical history | |||
Hypertension | 201 (65.3%) | 195 (63.3%) | 0.614 |
Diabetes | 97 (31.5%) | 91 (29.5%) | 0.6 |
Smoking | 35 (11.4%) | 52 (16.9%) | 0.049 |
Drinking | 25 (8.1%) | 30 (9.7%) | 0.48 |
Osteoporosis | 37 (12.0%) | 40 (13.0%) | 0.715 |
Laboratory data | |||
RBC | 4.28 ± 0.50 | 4.25 ± 0.52 | 0.962 |
Hemoglobin | 129.92 ± 14.21 | 129.94 ± 15.27 | 0.987 |
INR | 0.96 ± 0.07 | 0.97 ± 0.08 | 0.049 |
Surgical-related data | |||
Diagnosis | 0.589 | ||
Lumbar stenosis | 134 (43.5%) | 141 (45.8%) | |
Spondylolisthesis | 34 (11.0%) | 39 (12.7%) | |
Herniated disc | 140 (45.5%) | 128 (41.5%) | |
Type of surgery | 0.601 | ||
PLIF | 113 (36.7%) | 125 (40.6%) | |
TLIF | 157 (51.0%) | 146 (47.4%) | |
Combined | 38 (12.3%) | 37 (12.0%) | |
Number of fused levels | 0.416 | ||
1 | 180 (58.4%) | 170 (55.2%) | |
2 | 128 (41.6%) | 138 (44.8%) | |
Drainage number | 0.214 | ||
Single | 126(40.9%) | 111(36.0%) | |
Double | 182(59.1%) | 197(64.0%) | |
Intraoperative blood loss | 305.44 ± 151.21 | 214.58 ± 183.71 | 0.5 |
Surgical duration | 183.74 ± 48.66 | 183.92 ± 54.58 | 0.966 |
Number of intraoperative transfusion | 0.922 | ||
Autologous | 61 (19.8%) | 50 (16.2%) | |
Allogeneic | 9 (2.9%) | 7 (2.2%) | |
Number of postoperative transfusion | 34 (11.0%) | 24 (7.8%) | 0.168 |