Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Healing rate
[36] Systematic review 3-armed trial	113 people, 133 ulcerated limbs Data from 1 RCT	Proportion of ulcers healed 25/43 (58%) with zinc oxide bandage 16/46 (35%) with alginate dressings	OR 2.6 95% CI 1.1 to 6.1	Moderate effect size	zinc oxide bandage
[36] Systematic review 3-armed trial	113 people, 133 ulcerated limbs Data from 1 RCT	Proportion of ulcers healed 19/44 (43%) with zinc oxide stocking 16/46 (35%) with alginate dressings	OR 1.42 95% CI 0.61 to 3.34		Not significant