Comparison of computed tomography findings between bacteremic and non-bacteremic acute pyelonephritis due to Escherichia coli

Table 1 Frequencies of computed tomography findings in patients with or without bacteremia n (%)

CT findings	Patients with bacteremia (n = 34)	Patients without bacteremia (n = 94)	P value
Renal findings
APN grade			0.88
1	2 (5.8)	7 (7.0)
2	21 (61.8)	50 (53.2)
3	8 (23.5)	24 (25.5)
4	3 (8.8)	13 (13.8)
Urothelial thickening	29 (85.3)	61 (64.9)	0.03
Bilateral involvement	10 (29.4)	31 (33.0)	0.70
Perirenal infiltration	27 (79.4)	69 (73.4)	0.49
Rupture of abscess	0	4 (4.3)	0.22
Extrarenal findings
Diffuse peritoneal thickening	9 (26.5)	4 (4.3)	< 0.01
Cystitis	15 (44.1)	19 (20.2)	< 0.01
Pulmonary congestion	16 (47.1)	20 (21.3)	< 0.01
Pleural effusion	8 (23.5)	14 (14.9)	0.25

APN: Acute pyelonephritis; CT: Computed tomography.

Table 2 Variables selected for logistic regression analysis for predicting bacteremia

CT findings	OR (98%CI)	P value
Renal findings
Urothelial thickening	3.16 (1.20-8.28)	0.02
Bilateral involvement	1.05 (0.49-2.29)	0.90
Perirenal infiltration	1.50 (0.61-3.67)	0.38
Rupture of abscess	0.56 (0.06-5.19)	0.61
Renal findings
Diffuse peritoneal thickening	7.50 (2.18-25.81)	< 0.01
Cystitis	4.15 (1.82-9.45)	< 0.01
Pulmonary congestion	4.73 (2.15-10.42)	< 0.01
Pleural effusion	1.61 (0.63-4.08)	0.32

CT: Computed tomography.