Table 2.

Assessment of three clinical trials of treatment of urinary tract infection

Appraisal	Clinical trial
	Iravani 199318	Osterberg et al 199019	Saginur et al 199220
Were participants randomly assigned to treatment?	Yes	Yes	Yes
Was the randomisation list concealed?	Yes	Yes	Yes
Was there an intention to treat analysis?	No	No	No
Was blinding maintained among patients and clinicians?	Yes	Yes	Yes
Aside from the experimental treatment were the groups treated equally?	Yes	Yes	Yes
Were the groups similar at the start of the trial?	Yes	No data provided	Yes

Checklist adapted from Sackett et al⁵