Abstract
Sepsis is major determinants of prognosis in acute pyelonephritis (APN). This study aimed to assess factors associated with the development of sepsis among patients with clinically uncomplicated APN. We examined 463 patients presenting to our hospital without complications. We assessed clinical factors including demographic and laboratory features. Renal and extrarenal features on computed tomography (CT) were also analyzed. Risk factors of sepsis are assessed. The study included 361 patients without (78.0%) and 102 patients with sepsis (22.0%). Crude and attributable mortality rates were 3.9% and 2.0% versus 1.4% and 0.6%, respectively, among patients with and without sepsis. Clinical risk factors for sepsis were age >65years (odds ratio [OR] 1.79, P=0.02), absence of flank pain (OR 1.59, P=0.04), absence of costovertebral tenderness (OR 1.89, P=0.03), diabetes mellitus (OR 2.25, P=0.02), bacteremia (OR 2.8, P=0.01), C-reactive protein level >100mg/L (OR 1.42, P=0.02), and lack of previous APN history (OR 1.76, P=0.04). APN grade IV (OR 3.16, P=0.01), high grade hydronephrosis (OR 1.50, P=0.03), diffuse peritoneal thickening (OR 4.12, P=0.01), and acute interstitial pulmonary edema (OR 3.73, P=0.01) were the CT features predictive of septic shock. Although uncomplicated APN was largely non-fatal, several clinical and CT features could lead to sepsis. Our findings may be useful for predicting sepsis risk and deciding whether intravenous antibiotic treatment and intensive management should be initiated for uncomplicated APN.
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