Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

236 questions · 242 findings · 34 reviews · Headline outcomes only

No studies found 85 · 35.1%GRADE not reported 4 · 1.7%Very low 58 · 24%Low 52 · 21.5%Moderate 36 · 14.9%High 7 · 2.9%

Zinc vs placebo

Pulmonary exacerbations number of participants requiring IV antibiotics · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in pulmonary exacerbations number of participants requiring IV… compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Adverse events number of participants hospitalised during the trial · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in adverse events number of participants hospitalised during the trial compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Need for antibiotics days of antibiotic use · children with cystic fibrosis

It is very uncertain whether summary of findings: Zinc supplementation changes need for antibiotics number of days on IV or oral antibiotics compared with placebo (very low certainty).

1 finding from 1 review

220 mg zinc sulphate supplement containing 50 mg elemental zinc vs placebo

Ulcer healing · people with diabetes and foot ulcers

It is very uncertain whether 220 mg zinc sulphate supplement containing 50 mg elemental zinc changes ulcer healing (absolute change in individual parameters of ulcer… compared with placebo (very low certainty).

4 findings from 1 review
Show 1 more finding

Summary of findings table ‐ Protein, arginine, zinc and antioxidants vs standard diet or placebo

The proportion of pressure ulcers healed · residents of long‐term care (≥ 65 years) with pressure ulcers; inpatients with pressure ulcers

It is very uncertain whether summary of findings table ‐ Protein, arginine, zinc and antioxidants changes pressure ulcers healed compared with standard diet or placebo (very low certainty).

1 finding from 1 review