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Table 3 Surgical characteristics

From: Prolonged antibiotic prophylaxis use in elective orthopaedic surgery – a cross-sectional analysis

Characteristics SAP (N = 1137) PSAP (N = 155) P-Value OR (95% CI)
Foreign material    < 0.001  
 Prosthetic surgery 517 (45%) 96 (62%)   3.57 (1.92 to 6.64)
 Metal or non-absorbable synthetic material 389 (34%) 47 (30%)   2.33 (1.21 to 4.48)
 No foreign material 231 (20%) 12 (7.7%)   Reference
Surgeon ≥50 operations    < 0.001  
 A 183 (16%) 4 (2.6%)   0.19 (0.05 to 0.68)
 B 125 (11%) 2 (1.3%)   0.14 (0.03 to 0.70)
 C 179 (16%) 7 (4.5%)   0.33 (0.11 to 1.03)
 D 87 (7.7%) 51 (33%)   4.98 (2.00 to 12.4)
 E 126 (11%) 19 (12%)   1.28 (0.48 to 3.39)
 F 123 (11%) 7 (4.5%)   0.48 (0.15 to 1.51)
 G 49 (4.3%) 16 (10%)   2.78 (1.00 to 7.67)
 H 59 (5.2%) 0 (0.0%)   0.00 (0.00 to 0.45)
 I 51 (4.5%) 6 (3.9%)   Reference
Duration of operation (minutes) 68 (41) 87 (45) < 0.001 1.01 (1.01 to 1.01)
Type of anesthesiaa
 ITN (intubation anesthesia) 449 (39%) 51 (33%) 0.13 0.75 (0.53 to 1.07)
 SPA (spinal anesthesia) 557 (49%) 90 (58%) 0.040 1.44 (1.03 to 2.02)
 LMA (larynx mask anesthesia) 76 (6.7%) 9 (5.8%) 0.86 0.86 (0.42 to 1.75)
 Regional anesthesia 64 (5.6%) 9 (5.8%) 0.85 1.03 (0.50 to 2.12)
 Others 20 (1.8%) 0 (0.00%) 0.16 0.00 (0.00 to 1.39)
  1. Numbers are shown as mean (sd) or n (%)
  2. aType of anesthesia: multiple selection possible