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Table 2 Patient 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)
Age (years) 58 (14) 63 (12) < 0.001 1.03 (1.02 to 1.04)
Sex (female) 603 (53%) 79 (51%) 0.67 0.92 (0.66 to 1.29)
Active Smoking 206 (18%) 17 (11%) 0.031 0.56 (0.33 to 0.94)
Alcohol intake > 2 units/ daya 32 (2.8%) 3 (1.9%) 0.45 0.68 (0.21 to 2.25)
BMI (kg/m^2) 27 (4.8) 29 (5.6) < 0.001 1.06 (1.03 to 1.10)
bLung Disease 101 (8.9%) 27 (17%) 0.002 2.16 (1.36 to 3.44)
 COPD 17 (1.5%) 5 (3.2%) 0.17 2.20 (0.80 to 6.04)
 Asthma 36 (3.2%) 13 (8.4%) 0.005 2.80 (1.45 to 5.41)
 Other severe lung disease 56 (4.9%) 17 (11%) 0.005 2.38 (1.34 to 4.21)
Congestive or ischemic heart disease 67 (5.9%) 16 (10%) 0.05 1.84 (1.04 to 3.26)
Liver disease 10 (0.88%) 0 (0.00%) 0.62 0.00 (0.00 to 2.81)
Renal insufficiency 9 (0.79%) 2 (1.3%) 0.63 1.64 (0.35 to 7.65)
Diabetes 72 (6.3%) 9 (5.8%) 1.00 0.91 (0.45 to 1.86)
Cerebrovascular disease (TIA or CVI) 35 (3.1%) 10 (6.5%) 0.06 2.17 (1.05 to 4.48)
ASA (calculated)    < 0.001 1.65 (1.30 to 2.09)
 1 406 (36%) 37 (24%)   
 2 537 (47%) 70 (45%)   
 3 192 (17%) 48 (31%)   
 4 1 (0.09%) 0 (0.00%)   
Type of Surgery    < 0.001  
 Spine 206 (18%) 33 (21%)   1.22 (0.81 to 1.85)
 Hip 413 (36%) 11 (7.1%)   0.13 (0.07 to 0.25)
 Upper extremity 95 (8.4%) 3 (1.9%)   0.22 (0.07 to 0.69)
 Knee 283 (25%) 101 (65%)   5.64 (3.95 to 8.06)
 Foot 140 (12%) 7 (4.5%)   0.34 (0.15 to 0.73)
  1. Footnote: Numbers are shown as mean (sd) or n (%)
  2. aAlcohol intake, 1 “unit” corresponds to approximately 2 cl of liquor, 1 dl of wine or 3 dl of regular beer; BMI, body mass index
  3. bLung disease: multiple answers per patient were possible, e.g. presence of Asthma and a different severe lung disease in the same patient
  4. COPD chronic obstructive pulmonary disease, TIA transient ischemic attack, CVI cerebrovascular insult, ASA American Society of Anesthesiologists