Table 2.
Demographic Data of Patients with MRCNS-Positive and MRCNS-Negative Preoperative Skin Culture.
| MRCNS+(n=49) | MRCNS−(n=458) | p-Value | |
|---|---|---|---|
| Agea (years) | 65.00 (50.25–74.00) | 64.00 (47.00–73.00) | 0.968 |
| Males (% of group) | 30 (61.2) | 209 (45.6) | 0.050 |
| Main surgical lesion—cervical spine, n (%) | 22 (44.9) | 170 (37.1) | 0.542 |
| BMIa (kg/m2) | 24.50 (20.66–28.00) | 24.00 (20.83–27.14) | 0.448 |
| Obesity, n (%) | 22 (44.9) | 189 (41.3) | 0.649 |
| Smoker, n (%) | 3 (6.1) | 25 (5.5) | 0.745 |
| Hypertension, n (%) | 14 (28.6) | 164 (35.8) | 0.348 |
| Diabetes, n (%) | 13 (26.5) | 88 (19.2) | 0.258 |
| Hyperlipidemia, n (%) | 3 (6.1) | 27 (5.9) | 1.000 |
| Chronic renal failure, n (%) | 3 (6.1) | 23 (5.0) | 0.730 |
| Cancer, n (%) | 5 (10.2) | 33 (7.2) | 0.398 |
| RA, n (%) | 4 (8.2) | 4 (0.9) | 0.004* |
| Steroid use, n (%) | 6 (12.2) | 12 (2.6) | 0.005* |
| Immunosuppressive drugs use, n (%) | 2 (4.1) | 10 (2.2) | 0.326 |
| ASA-PS ≥3, n (%) | 22 (44.9) | 133 (29.0) | 0.033* |
| JOA scorea | 13.00 (10.13–15.38) | 14.00 (11.00–16.00) | 0.196 |
BMI, body mass index; RA, rheumatoid arthritis; ASA-PS, American Society of Anesthesiologists Physical Status; MRCNS, methicillin-resistant coagulase-negative staphylococci; JOA, Japanese Orthopaedic Association
*Chi-square test, p<0.05. aValues are presented as median and interquartile range.