Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

46 questions · 48 findings · 5 reviews · Cystic Fibrosis and Genetic Disorders

No studies found 29 · 60.4%GRADE not reported 1 · 2.1%Very low 7 · 14.6%Low 7 · 14.6%Moderate 4 · 8.3%High 0 · 0%

Vitamin K vs control

Uncarboxylated osteocalcin: change in carboxylation of osteocalcin (% Glu‐OC) · adults and children with cystic fibrosis

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin C 1400 mg plus vitamin E 800 mg vs placebo

Severity of pain (use of opioid analgesics) · adults with sickle cell disease (adults with homozygous SCA or sickle beta 0 thalassaemia SCD)

It is very uncertain whether vitamin C 1400 mg plus vitamin E 800 mg changes severity of pain (use of opioid analgesics) compared with placebo (very low certainty).

1 finding from 1 review

Vitamin C 1400 mg plus vitamin E 800 mg vs placebo

Acute chest syndrome ( · adults with sickle cell disease (adults with homozygous SCA or sickle beta 0 thalassaemia SCD)

It is very uncertain whether vitamin C 1400 mg plus vitamin E 800 mg changes frequency of sickle cell‐related complications: acute chest syndrome compared with placebo (very low certainty).

1 finding from 1 review