Table 2.

Main clinical and biochemical data at presentation

	Single lesions	Multiple lesions	p	Simple lesions	Abscessed lesions	p	All cases
SCr (mg/dL)	1.03 ± 0.43	0.89 ± 0.28	0.07°	0.95 ± 0.37	0.89 ± 0.22	0.26°	0.92 ± 0.32
CRP (mg/dL)	10.3 (1.3-39)	12.5 (0.2-36)	0.41*	10.6 (0.3-39)	13.3 (0.2-31)	0.14*	12.1 (0.2-39)
WBC (n/mm3)	13042 ± 4128	12397 ± 4139	0.49°	12103 ± 4185	13194 ± 3990	0.16°	12528 ± 4127
Positive urinary cultures	12.5%	26.3%	0.25^	19.4%	30%	0.28^	23.5%
Positive hemocultures	0%	15.8%	0.004^	16.7%	6.4%	0.014^	12.6%
Fever	39 (36-40)	39 (36-41)	0.12*	39 (36-40)	39 (36-41)	0.17*	39 (36-41)
Flank pain - tenderness	87.5%	88.4%	1^	84.7%	93.6%	0.24^	88.2%
Lower urinary tract symptoms	62.5%	43.2%	0.14^	41.7%	55.3%	0.20^	47.1%
Antibiotic treatment in the last 3 days	54%	39%	0.31^	43.1%	40.4%	0.33^	42%
Time between symptoms and diagnosis	3 (1-14)	3 (1-30)	0.54*	3 (1-30)	3 (1-20)	0.36*	3 (1-30)
Tetrad (fever, pain, lower UTI, positive cultures)	8.3%	11.7%	0.92^	5.6%	19.6%	0.039^	11%
Eligible for a trial (tetrad and no recent antibiotic therapy)	4.2%	9.5%	0.67^	4.2%	14.9%	0.08^	8.4%

UTI: Urinary tract infection

*Mann-Whitney U test

°Student's t-test

^Pearson's chi-square test