Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

159 questions · 167 findings · 16 reviews

No studies found 28 · 16.8%GRADE not reported 2 · 1.2%Very low 38 · 22.8%Low 53 · 31.7%Moderate 27 · 16.2%High 19 · 11.4%

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

Omega‐3 vs placebo

Mental state: psychotic symptoms Average total score (PANSS, higher score = worse, scale from 30‐210) Long‐term (up to 7 years) · people in the prodromal stage of psychosis
1 finding from 1 review

Omega‐3 vs placebo

Adverse effects: neurological, extrapyramidal UKU (events) Medium‐term · people in the prodromal stage of psychosis

Group A: omega‐3 fatty acids showed no clear difference in adverse effects: neurological, extrapyramidal UKU (events) Medium‐term compared with placebo (low certainty).

1 finding from 1 review

Omega‐3 vs placebo

Satisfaction with treatment: 1. Leaving the study early ‐ long term · people in the prodromal stage of psychosis

Group A: omega‐3 fatty acids showed no clear difference in satisfaction with treatment: leaving the study early Long‐term… compared with placebo (low certainty).

1 finding from 1 review

Omega‐3 vs placebo

Prodromal symptoms: transition to psychosis Endpoint data (events) · people in the prodromal stage of psychosis

Group A: omega‐3 fatty acids may leads to lower prodromal symptoms: transition to psychosis Long‐term (events) compared with placebo (low certainty).

1 finding from 1 review

Omega‐3 vs placebo

Global state: antipsychotic prescription Long‐term (events) · people in the prodromal stage of psychosis

Group A: omega‐3 fatty acids may leads to lower global state: antipsychotic prescription Long‐term (events) compared with placebo (low certainty).

1 finding from 1 review

Omega‐3 fatty acids and antioxidants vs standard diet or placebo

Mortality within the longest · adults (aged 18 years or older), mechanically ventilated participants with ARDS as defined by the Berlin definition of ARDS or, for older…

Omega‐3 fatty acids and antioxidants showed no clear difference in all‐cause mortality (longest period reported) compared with placebo or standard nutrition (low certainty).

1 finding from 1 review

Omega‐3 fatty acids and antioxidants vs standard diet or placebo

Adverse effects (cardiac) · adults (aged 18 years or older), mechanically ventilated participants with ARDS as defined by the Berlin definition of ARDS or, for older…

It is very uncertain whether omega‐3 fatty acids and antioxidants changes cardiac adverse events (study author reported anytime during study… compared with placebo or standard nutrition (very low certainty).

1 finding from 1 review

Omega‐3 fatty acids and antioxidants vs standard diet or placebo

Gastrointestinal adverse events · adults (aged 18 years or older), mechanically ventilated participants with ARDS as defined by the Berlin definition of ARDS or, for older…

It is very uncertain whether omega‐3 fatty acids and antioxidants changes gastrointestinal adverse events (study author reported anytime… compared with placebo or standard nutrition (very low certainty).

1 finding from 1 review

Omega‐3 fatty acids and antioxidants vs standard diet or placebo

Study author‐reported adverse events · adults (aged 18 years or older), mechanically ventilated participants with ARDS as defined by the Berlin definition of ARDS or, for older…

It is very uncertain whether omega‐3 fatty acids and antioxidants changes total number of adverse events (study author reported anytime during… compared with placebo or standard nutrition (very low certainty).

1 finding from 1 review