TABLE 3.
Characteristics of patients according to type of antibiotic prophylaxisa
| Characteristic | Result for the following group: |
P valueb | |
|---|---|---|---|
| C group (n = 995) | CT group (n = 791) | ||
| Median (IQR) age (yr) | 71 (64–77) | 72 (64–78) | 0.236 |
| No. (%) of patients by gender | |||
| Female | 669 (67.2) | 525 (66.4) | 0.700 |
| Male | 326 (32.8) | 266 (33.6) | |
| Median (IQR) BMI (kg/m2) | 29.9 (26.8–33.3) | 29.3 (26.4–32.3) | 0.003 |
| No. (%) of patients with preoperative ASA classification of III or higher | 185 (18.6) | 155 (19.6) | 0.590 |
| No. (%) of patients with the following comorbidity: | |||
| Hypertension | 424 (42.6) | 432 (54.6) | <0.001 |
| Diabetes mellitus | 131 (13.2) | 98 (12.4) | 0.626 |
| Malignancy | 64 (6.4) | 53 (6.7) | 0.820 |
| Liver disease | 21 (2.1) | 14 (1.8) | 0.606 |
| Lung disease | 96 (9.6) | 70 (8.8) | 0.564 |
| Chronic renal failure | 8 (0.8) | 6 (0.8) | 0.914 |
| Median (IQR) duration of surgery (min) | 90 (75–105) | 85 (75–100) | 0.002 |
| No. (%) of patients with arthroplasty at the following site: | |||
| Knee | 736 (74.0) | 554 (70.0) | 0.065 |
| Hip | 259 (26.0) | 237 (30.0) | |
| Median (IQR) Hg value (g/dl) | |||
| Preoperative | 136 (128–145) | 138 (128–147) | 0.185 |
| Postoperative | 113 (104–121) | 112 (104–122) | 0.884 |
| No. (%) of patients receiving a red blood cell transfusion | 110 (11.1) | 83 (10.5) | 0.704 |
a
IQR, interquartile range; BMI, body mass index; Hg, hemoglobin.
b
Boldface values indicate statistically significant differences.