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Table 2 Univariate and multivariate analyses of factors associated with surgical site infection

From: A predictive nomogram for surgical site infection in patients who received clean orthopedic surgery: a retrospective study

Characteristics

Univariate analysis

Multivariate analysis

OR (95% CI)

P value

OR (95% CI)

P value

(Intercept)

  

3.008 (0–0.0230)

< 0.001

Age, year

0.993 (0.973–1.014)

0.497

  

BMI

1.076 (0.997–1.160)

0.055

  

ASA class

2.242 (1.035–5.030)

0.045

1.564 (1.029–5.990)

0.046

NNIS class

6.609 (2.733–15.904)

< 0.001

  

Postoperative drainage

4.656 (2.033–11.387)

< 0.001

  

Implants

2.582 (0.947–9.065)

0.091

  

Operation time

1.014 (1.008–1.020)

< 0.001

1.003 (1.006–1.019)

< 0.001

Length of hospital stay

1.171 (1.041–1.333)

0.011

1.065 (0.969–1.258)

0.101

RBC, 1012 /L

0.872 (0.438–1.750)

0.698

  

WBC, 109 /L

1.177 (0.997–1.382)

0.048

  

Platelet, 109 /L

1.001 (0.996–1.005)

0.685

  

Haemoglobin, g/L

0.999 (0.977–1.021)

0.906

  

AST, U/L

1.018 (0.994–1.041)

0.108

  

ALT, U/L

1.003 (0.982–1.019)

0.742

  

Total bilirubin, μmol/L

1.033 (0.985–1.079)

0.148

  

Direct bilirubin, μmol/L

1.109 (0.947–1.274)

0.162

  

GGT, IU/L

0.998 (0.976–1.011)

0.842

  

Albumin, g/L

0.976 (0.872–1.096)

0.676

  

Creatinine, μmol/L

0.991 (0.961–1.019)

0.532

  

Prothrombin time, s

0.964 (0.623–1.486)

0.866

  

D-Dimer, μg/mL

1.169 (1.049–1.386)

0.033

1.055 (1.022–1.29)

0.046

  1. ASA American society of anesthesiology, NNIS national nosocomial infections surveillance, RBC Red blood cell, WBC white blood cell, ALT alanine aminotransferase, AST aspartate aminotransferase, BMI body mass index, GGT gamma-glutamyl transferase
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X