Smith 1977.

Methods	RCT Study aim clearly defined: yes Blinded assesor of primary outcome: yes Double blind study: yes Participants comparable at baseline for age: yes Sex: not stated Duration of complaint: yes Inclusion and exclusion criteria specified: not stated Interventions well described: yes Assessment of compliance: yes Intention to treat analysis: yes A Priori sample size calculation: not stated Fungi identified: yes Distribution of species between groups: not stated Adverse events reported: yes Number of drop outs stated: nine
Participants	Total evaluable sample size: 104 Treatment setting: Health Center
Interventions	a. 20% zinc undecylenate and 2% undecylenic acid ‐ new commercial powder Duration: six weeks Frequency: applied once daily b. 20% Undecylenate and 2% undecylenic acid ‐ over the counter powder Duration: six weeks Frequency: applied once daily c. Placebo powder Duration: six weeks Frequency: applied once daily
Outcomes	Primary outcome: cure Adverse events: a. two patients with pruritus
Notes	Culture results only
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Low risk	A ‐ Adequate