6. European Association of Urology classification of urinary tract infection.

Uncomplicated UTIs	Acute, sporadic or recurrent lower (uncomplicated cystitis) and/or upper (uncomplicated pyelonephritis) UTI, limited to non‐pregnant, premenopausal women with no known relevant anatomical and functional abnormalities within the urinary tract or co‐morbidities
Complicated UTIs	All UTIs that are not defined as uncomplicated. Meaning in a narrower sense UTIs in a patient with an increased chance of a complicated course: i.e. all men, pregnant women, patients with relevant anatomical or functional abnormalities of the urinary tract, IUCs, renal diseases, and/or with other concomitant immunocompromising diseases for example, diabetes
Recurrent UTIs	Recurrences of uncomplicated and/or complicated UTIs, with a frequency of at least 3 UTIs/year or 2 UTIs in the last 6 months
Catheter associated UTIs (CAUTI)	Catheter‐associated urinary tract infection (CAUTI) refers to UTIs occurring in a person whose urinary tract is currently catheterised or has had a catheter in place within the past 48 h
Urosepsis	Urosepsis is defined as life‐threatening organ dysfunction caused by a disregulated host response to infection originating from the urinary tract and/or male genital organs

CAUTI: catheter‐associated urinary tract infection; IUC: indwelling urethral catheter; UTI: urinary tract infection

Table obtained from EAU Guidelines on Urological Infections (EAU 2020).