Study	Reason for exclusion
Brumfitt 1973	This study presented data obtained from earlier studies. Original data were not presented. The data about treatment of asymptomatic bacteriuria were supposedly taken from a study by Leigh 1970. This study however, could not be retrieved.
Brumfitt 1982	Not a RCT.
Christopher 1969	It was a crossover study.
Davies 1975	Some of the subjects in the study were symptomatic.
De Cecco 1987	It was a crossover study which used only preliminary studies
Harris 1982	4 antibiotic regimens were compared at the same time and results were not presented by randomization group
McFadyen 1987	Only 1 subgroup was randomized. It was not clear why that subgroup was used for randomization
Pathak 1969	Nitrofurantoin was compared with placebo.
Pedler 1985	The subjects included symptomatic patients.
Pregazzi 1987	Single versus traditional dosing schedules of different antibiotics taken together were compared. Results from different antibiotics were presented together (i.e. single dose of penicillins, cephalosporins, and co-trimoxazole versus their traditional dosing schedules)
Reeves 1975	The study randomized only 1 subgroup. It was not clear why that subgroup was randomized
Sanderson 1984	This trial focused on prophylaxis in women who had already been treated for bacteriuria
Stamatiou 2007	It was not a randomized trial. Some of the subjects had symptomatic urinary tract infection
Thoumsin 1990	Only preliminary data were published.
Whalley 1977	Short-term therapy (of either 1 of 2 antibiotics) was compared with long therapy (of one of the antibiotics)
Zinner 1971	It was not for asymptomatic bacteriuria.
Zinner 1990	The study included symptomatic patients.

RCT: randomized controlled trial