Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

118 questions · 118 findings · 14 reviews

No studies found 13 · 11%GRADE not reported 1 · 0.8%Very low 67 · 56.8%Low 32 · 27.1%Moderate 5 · 4.2%High 0 · 0%

Omega‐3 vs placebo

Z score BMI · adults and children with cystic fibrosis

It is very uncertain whether summary of findings: omega‐3 fatty acid supplementation changes growth and nutrition: BMI SD score compared with placebo (very low certainty).

1 finding from 1 review

Intervention not reported

Anthropometric measures other than body weight a) BMI b) Waist circumference c) Fat mass · participants living with overweight or obesity
1 finding from 1 review

Selenium (+LT4) vs placebo (+LT4)

Change from baseline in assessment of symptoms such as mood, fatigue and muscle weakness Short‐Form Health Survey · participants with Hashimoto's thyroiditis.

Selenium (+LT4) may leads to higher change from baseline in assessment of symptoms such as mood, fatigue… compared with placebo (+LT4) (low certainty).

1 finding from 1 review