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Table 1 The best parsimonious models for prediction of SSIs

From: Predicting postoperative surgical site infection with administrative data: a random forests algorithm

Model 1. The best parsimonious model of hospitalization diagnostic (ICD 10) codes
Effect *AOR, 95% CI Risk point
T81- Operative complication (infection, hemorrhage, etc.) 6.40 (5.08–8.01) 2
K65 - Peritonitis 5.87 (3.88–7.88) 1
B96 - Other bacterial agents causing infections 2.56 (1.84–3.47) 1
K83 - Biliary duct infection, obstruction, perforation 6.32 (4.42–8.01) 3
Y83 - Surgical operation/procedures as the cause of abnormal reaction of the patient/ or later complication 2.46 (1.97–3.07) 1
B95 – Streptococcus/ staphylococcus as the cause of diseases 3.25 (2.17–4.87) 1
Model 2. The best parsimonious model of physician diagnostic (ICD 9) codes
Effect AOR, 95% CI Risk point
686 - Pyoderma, pyogenic granuloma, other local infections 8.13 (6.50–9.20) 3
682- Cellulitis, abscess 4.70 (3.57–6.10) 2
998 - Other complications of procedures 5.68 (4.77–6.78) 2
556 - Ulcerative colitis 8.60 (6.31–9.18) 3
685 - Pilonidal cyst with fistula, abscess 2.69 (1.52–3.76) 2
560 - Intestinal obstruction without mention of hernia 2.97 (2.19–4.01) 2
154 - Malignant neoplasm of rectum, rectosigmoid junction 4.37 (3.29–5.17) 2
599 - Other disorders of urethra and urinary tract 2.04 (1.55–2.62) 1
153 - Malignant neoplasm of colon 2.71 (2.02–3.22) 1
Model 3. The best parsimonious model of physician procedure claims
Effect AOR, 95% CI Risk point
Z59 - Digestive system surgical procedure: colon/biliary tract 7.38 (6.08–9.09) 4
C46 - Infectious disease: hospital consult/assessment 5.77 (4.66–7.43) 3
Z10 - Skin/subcutaneous tissue: incision of abscess or hematoma 7.88 (6.04–8.67) 3
C03 - General surgery: hospital consult/assessment 3.45 (2.86–4.19) 2
H15 - Family practice: assessment on weekend 2.33 (1.80–3.01) 2
S16 - Digestive system surgical procedures: intestine 1.98 (1.48–2.52) 1
C20 - Obstetrics and gynecology assessment/consult 2.25 (1.66–3.05) 2
Z08 - Debridement of wound(s) and/or ulcer(s) 4.01 (2.83–5.56) 3
S21 - Digestive system surgical procedures: colon/rectum 2.65 (1.91–3.62) 2
R06 - Skin/subcutaneous tissue: free island flaps 4.64 (2.58–6.36) 3
C13 - Internal medicine: hospital assessment/consult 1.96 (1.52–2.36) 1
H13 - Family practice: assessment/consult on weekdays 2.85 (2.18–3.52) 2
C21 – Pain management: limited consultations 1.84 (1.55–2.10) 1
R11- Operations of the breast: incision, excision, repair 2.81 (1.02–3.41) 3
  1. *AOR, 95% CI = Adjusted Odds Ratio, 95% Confidence Interval