Findings

What do systematic reviews say?

3 questions · 3 findings · 2 reviews · Airways

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No studies found 1 · 33.3%GRADE not reported 0 · 0%Very low 2 · 66.7%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Tailoring asthma treatment using FeNO vs clinical symptoms

Asthma exacerbations · children with asthma

It is very uncertain whether tailoring asthma treatment using fractional exhaled nitric oxide changes number of asthma exacerbations per 52 weeks (exacerbation rate) compared with clinical symptoms (very low certainty).

1 finding from 1 review

Exhaled nitric oxide levels to guide treatment for children with asthma 2016 · Cochrane Headline outcomes only
no estimate extracted
4 studies · 736 participants
Very low

Vitamin C vs placebo

Asthma exacerbations · adults and children with exercise‐induced bronchoconstriction/asthma

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Vitamin C vs placebo

Asthma exacerbations · people with asthma

1 finding from 1 review

Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes only
no estimate extracted
1 study · 16 participants
Very low