Aim: The widespread existence of extended-spectrum β-lactamase (ESBL) producing Escherichia coli (E. coli) has become a critical threat in developed countries. Prediction rule for ESBL producing E. coli is relevant to see patients with suspected urinary tract infection.
Materials and methods: We collected clinical and laboratory data and constructed multivariate logistic regression models to develop a clinical prediction rule in the derivation cohort with 1185 patients with urine cultures and validated the rule in the validation cohort with 516 patients.
Results: ESBL-producing E. coli was found in 185 patients (16%) in the derivation cohort. When assigning 14 points for being female (odds ratio (OR): 4.2), six points for CRP >5 mg/dl (OR: 1.87), and four points for a history of urinary tract infection (OR: 1.52), the area under the curve (AUC) had 0.67 (95% confidence interval (CI): 0.63-0.70) in the derivation cohort and 0.64 (95% CI: 0.59-0.69] in the validation cohort.
Conclusions: The developed prediction rule had moderate accuracy to predict ESBL-producing E. coli in patients with suspected urinary tract infection.
Keywords: ESBL-producing E. coli; clinical prediction rule; cohort; urinary tract infection.