Table 1 Demographics
Factor | Categorization | Numbers (%) if not stated otherwise | Missing (%) |
|---|---|---|---|
Patient characteristics | |||
Sex | Male | 14,869 (42.4%) | 0.0 |
Female | 20,187 (57.6%) | ||
Age, mean (SD) | 69.5 (10.5) | 0.0 | |
Age group | < 55 | 3228 (9.2%) | 0.0 |
55–69 | 12,303 (35.1%) | ||
70–84 | 17,786 (50.7%) | ||
85+ | 1739 (5.0%) | ||
ASA classification | ASA I | 6087 (17.4%) | 0.2 |
ASA II | 21,147 (60.4%) | ||
ASA III and IV | 7769 (22.2%) | ||
BMI, mean (SD) | 27.5 (4.5) | 1.1 | |
BMI class | |||
Normal weight and underweight | < 18.5–24.9 | 10,555 (30.5%) | |
Overweight | 25–29.9 | 14,570 (42.0%) | |
Obesity class 1 | 30–34.9 | 7303 (21.1%) | |
Obesity class 2/3 | > 35 | 2225 (6.4%) | |
Smoking status | Non-smoker | 28,797 (95.1%) | 13.6 |
Smoker | 1484 (4.9%) | ||
Diagnosis | Primary osteoarthritis | 32,097 (91.6%) | 0.0 |
Other | 2977 (8.4%) | ||
Reoperation due to PJI within 1 year | 460 (1.3%) | ||
Intraoperative characteristics | |||
Level of hospital | University hospital | 2466 (7.0%) | 0.0 |
County hospital | 28,553 (81.4%) | ||
Private hospital | 4037 (11.4%) | ||
Anesthesia | Spinal | 28,361 (86.7%) | 6.7 |
General | 4346 (13.3%) | ||
Incision | Lateral | 15,905 (45.4%) | 0.0 |
Posterior | 18,755 (53.5%) | ||
Other | 394 (1.1%) | ||
Fixation | Cemented | 20,861 (59.6%) | 0.2 |
Uncemented | 8631 (24.7%) | ||
Hybrid | 5502 (15.7%) | ||
Operative time, mean minutes (SD) | 0.0 | ||
Overall mean (SD) | 85.4 (28.9) | ||
Operative time cemented mean (SD) | 90.2 (27.9) | ||
Operative uncemented mean (SD) | 76.9 (28.7) | ||
Operative time hybrid mean (SD) | 80.6 (29.1) | ||
Type of ventilation | Unidirectional airflow | 29,762 (84.9%) | 0.0 |
Mixed turbulent airflow | 5294 (15.1%) | ||