Laboratory Medicine and Quality Assurance

Table. 2.

Results of multivariate analysis for the significant factors associated with bacterial infections

Variable Odds ratio (95% CI) P-value
Onset ≥24 hr 1.868 (1.258 to 2.775) 0.0020
BT (℃) 1.278 (1.047 to 1.561) 0.0160
PDW (fL) 1.175 (1.070 to 1.290) 0.0007
Neutrophil # (×103/µL) 1.110 (1.064 to 1.158) <0.0001
ESR (mm/hr) 1.010 (1.002 to 1.018) 0.0177
SAA (mg/L) 1.007 (1.005 to 1.009) <0.0001

The following variables that showed a variance inflation factor below 5.0 were included in the multivariate binary logistic regression analysis: patient’s age and sex, whether a patient presented with fever and/or related symptoms or not, whether a patient visited the emergency room before or after 24 hours after the onset of symptoms, maximum BT during the first day in the emergency room, CBC indices (RBC count, MCV, MCHC, RDW, platelet count, PDW, neutrophils, lymphocytes, eosinophil counts, %monocytes, and %basophils), serum levels of SAA and CRP, and ESR.

Abbreviations: CI, confidence interval; BT, body temperature; PDW, platelet distribution width; ESR, erythrocyte sedimentation rate; SAA, serum amyloid A; CBC, complete blood count; RBC, red blood cells; MCV, mean corpuscular volume; MCHC, mean corpuscular hemoglobin concentration; RDW, RBC distribution width; CRP, C-reactive protein.

Lab Med Qual Assur 2023;45:156~165
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