Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,536 questions · 2,637 findings · 315 reviews

No studies found 608 · 23.1%GRADE not reported 488 · 18.5%Very low 688 · 26.1%Low 540 · 20.5%Moderate 249 · 9.4%High 64 · 2.4%

Any antimicrobial mouthwash and/or nasal spray (alone or in combination), at any concentration, delivered to healthcare workers, with or without the same intervention given to the patients with COVID-19 vs No treatment or saline or water

Other adverse events (allergy, irritation/burning of nasal, oral or oropharyngeal mucosa, long-term staining of mucous membranes or teeth, accidental ingestion) · Healthcare workers (HCWs) treating patients with suspected or confirmed COVID-19 infection

The review found no eligible studies for this question.

1 finding from 1 review

Thiazolidinediones vs no intervention

Serious adverse events (number of events) · people with non‐alcohol‐related fatty liver disease (NAFLD)

It is very uncertain whether thiazolidinediones changes serious adverse events (number of events) compared with no intervention (very low certainty).

1 finding from 1 review

Intermittent iron supplementation (alone or with any other micronutrients) vs no supplementation or placebo

All‐cause morbidity · adolescent and adult menstruating women

Intermittent iron supplementation (alone or with any other… showed no clear difference in all‐cause morbidity (the most frequent event associated with the… compared with no supplementation or placebo (low certainty).

1 finding from 1 review