Study	Reason for exclusion
Colodner 2003	Same product used as intervention in both study arms
Dani 2002	Neonatal population
Manley 2007	Probiotic was used for treatment, not prophylaxis
Mohseni 2013	Not probiotic monotherapy (combined with antibiotics)
Molander 1990	Intervention used was a hormone product, not a probiotic
NCT00900653	Intervention was a combination of low dose oestriol and Lactobacilli
Pushkarev 2005	Probiotic was used for treatment, not prophylaxis
Ranganathan 2009	Enrolled patients had CKD. Probiotics were tested for renoprotective effects and to relieve symptoms of uraemia. Patients were not selected for their susceptibility for UTI

CKD ‐ chronic kidney disease; UTI ‐ urinary tract infection