Findings

What do systematic reviews say?

7 questions · 7 findings · 1 reviews · Acute Respiratory Infections

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No studies found 3 · 42.9%GRADE not reported 0 · 0%Very low 2 · 28.6%Low 2 · 28.6%Moderate 0 · 0%High 0 · 0%

Vitamin A vs placebo

Incidence of acute URTIs during the study period (the number of acute URTIs over a period of time) · children up to the age of 7 at risk of upper respiratory tract infection

Summary of findings table ‐ Vitamin A supplements showed no clear difference in incidence of acute URTIs during the study period (the number of… compared with placebo (low certainty).

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
RR 1 [0.92, 1.09]
3 studies · 22668 participants
Low

Vitamin A vs placebo

Incidence of acute URTIs during the study period (proportion of participants with an acute URTI) · children up to the age of 7 at risk of upper respiratory tract infection

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 15535 participants
Low

Vitamin A vs placebo

Adverse events · children up to the age of 7 at risk of upper respiratory tract infection

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
1 study · 116 participants
Very low

Vitamin A vs placebo

Severity of subjective symptoms (mean duration of acute URTI) · children up to the age of 7 at risk of upper respiratory tract infection

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 290 participants
Very low

Vitamin A vs placebo

Time to occurrence of acute URTI ‐ not reported · children up to the age of 7 at risk of upper respiratory tract infection

The review found no eligible studies for this question.

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Vitamin A vs placebo

Number of cases with complications ‐ not reported · children up to the age of 7 at risk of upper respiratory tract infection

The review found no eligible studies for this question.

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Vitamin A vs placebo

Rate of hospitalisation ‐ not reported · children up to the age of 7 at risk of upper respiratory tract infection

The review found no eligible studies for this question.

1 finding from 1 review

Oral vitamin A supplements to prevent acute upper respiratory tract infections in children up to seven years of age 2024 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found