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Table 3 Univariate and multivariate analyses of effects of age, sex and clinical variables on mortality rate

From: Features and treatment modality of iliopsoas abscess and its outcome: a 6-year hospital-based study

  Univariate analysis Multivariate analysisa
  HR 95% CI Pvalue HR 95% CI Pvalue
Age (years) 1.05 (1.010-1.083) 0.013* 1.03 (0.986-1.071) 0.204
Sex-female 1.06 (0.421-2.655) 0.905 1.21 (0.369-3.997) 0.749
Gas-forming IPA 2.57 (1.060-6.250) 0.037* 1.93 (0.425-8.804) 0.393
Bilateral IPA 2.28 (0.943-5.524) 0.067 1.76 (0.563-5.481) 0.332
Multiloculated IPA collection pattern 0.85 (0.248-2.938) 0.801    
Mean maximal transverse IPA cavity diameter on CT (cm) 0.93 (0.747-1.162) 0.533    
DM 1.21 (0.490-2.996) 0.679    
Hypertension 0.41 (0.145-1.134) 0.085    
CKD 1.22 (0.459-3.265) 0.687    
Malignancy 1.34 (0.442-4.057) 0.605    
Liver cirrhosis 1.19 (0.346-4.080) 0.785    
Fever or hypothermia 1.53 (0.351-6.647) 0.572    
Severe sepsis 29.17 (0.215-3952) 0.178    
WBC (/μL) 1.00 (1.000-1.000) 0.004* 1.00 (1.000-1.000) 0.109
Bandemia 1.76 (0.722-4.315) 0.213    
Hb (g/dL) 0.89 (0.737-1.084) 0.255    
Platelet (×103/μL) 1.00 (0.992-0.999) 0.013* 1.00 (0.992-1.001) 0.109
BUN (mg/dL) 1.01 (1.005-1.017) 0.001* 1.00 (0.983-1.010) 0.623
Creatinine (mg/dL) 1.12 (1.009-1.233) 0.033* 0.93 (0.738-1.178) 0.555
ALT (U/L) 1.00 (0.998-1.002) 0.702    
Na (mEq/L) 1.01 (0.946-1.083) 0.721    
K (mEq/L) 2.54 (1.442-4.485) 0.001* 1.36 (0.674-2.761) 0.389
CRP (mg/L) 0.98 (0.935-1.021) 0.303    
CK (U/L) 1.00 (0.999-1.001) 0.972    
Initial blood glucose (mg/dL) 1.00 (0.996-1.003) 0.750    
Secondary IPA origin 0.37 (0.149-0.931) 0.035* 0.35 (0.081-1.490) 0.154
Initial treatment       
Antibiotics alone 6.49 (2.132-19.753) 0.001* 5.34 (1.266-22.558) 0.023*
PCD Reference   Reference  
Surgery 0.51 (0.098-2.627) 0.418 0.28 (0.039-2.017) 0.207
  1. aadjusted for age, gender, gas-forming IPA, bilateral IPA, WBC, Platelet, BUN, creatinine, K, secondary IPA origin, and initial treatment.
  2. *P < 0.05.
  3. ALT, alanine aminotransferase; BUN, blood urea nitrogen; CK, creatine kinase; CKD, chronic kidney disease; CRP, C-reactive protein; CT, computed tomography; DM, diabetes mellitus; Hb, hemoglobin; HR, hazard ratio; IPA, iliopsoas abscess; K, potassium; Na, sodium; PCD, percutaneous drainage; SD, standard deviation; WBC, white blood cells.