Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

103 questions · 109 findings · 16 reviews

No studies found 19 · 17.4%GRADE not reported 5 · 4.6%Very low 35 · 32.1%Low 23 · 21.1%Moderate 23 · 21.1%High 4 · 3.7%

Oral nutritional supplements vs placebo

Ulcer healing · people with diabetes and foot ulcers

The review found no eligible studies for this question.

2 findings from 1 review

Multivitamin plus iron plus folate vs iron plus folate

Total fetal loss (including miscarriages or combined miscarriages and stillbirths) · pregnant women

Multivitamin plus iron plus folate showed no clear difference in total fetal loss (including miscarriages or combined miscarriages… compared with iron plus folate (high certainty).

1 finding from 1 review

Vitamin A and fish oils (docosahexaenoic acid) vs placebo, vitamins, or no treatment

Visual acuitychange in logMAR visual acuity, may be reported as ETDRS · retinitis pigmentosa

It is very uncertain whether vitamin A and fish oils (docosahexaenoic acid) changes visual acuitychange in logMAR visual acuity, may be reported as ETDRS compared with placebo, vitamins (including vitamin A), or no therapy (very low certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea

The review found no eligible studies for this question.

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with resolution of itch within 2 weeks, as rated by the participant · pityriasis rosea

Azithromycin showed no clear difference in the proportion of participants with resolution of itch within 2… compared with placebo or vitamins (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by a medical practitioner · pityriasis rosea

Azithromycin showed no clear difference in the proportion of participants with good or excellent rash… compared with placebo or vitamins (low certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

Minor participant‐reported adverse events not requiring withdrawal of the treatment: Mild abdominal pain. · pityriasis rosea

Azithromycin showed no clear difference in minor participant‐reported adverse events not requiring withdrawal… compared with placebo or vitamins (moderate certainty).

1 finding from 1 review

Acyclovir vs placebo, vitamins, or no treatment

The proportion of participants with resolution of itch within 2 weeks, as rated by the participant · pityriasis rosea

Acyclovir probably leads to lower proportion of participants with resolution of itch within 2 weeks,… compared with placebo, vitamins, or no treatment (moderate certainty).

1 finding from 1 review