Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,539 questions · 2,602 findings · 424 reviews · Headline outcomes only

No studies found 572 · 22%GRADE not reported 189 · 7.3%Very low 527 · 20.3%Low 685 · 26.3%Moderate 514 · 19.8%High 115 · 4.4%

Two doses of HPV vaccine with longer interval vs two doses of HPV vaccine with shorter interval

High‐grade cervical, vulval, vaginal, penile, or anal intraepithelial neoplasia · 9‐ to 14‐year‐old females and males

The review found no eligible studies for this question.

1 finding from 1 review

Two doses of HPV vaccine with longer interval vs two doses of HPV vaccine with shorter interval

Serious adverse events at up to 5‐year · 9‐ to 14‐year‐old females and males

It is very uncertain whether two doses of HPV vaccine with longer interval changes serious adverse events at up to 5‐year compared with two doses of HPV vaccine with shorter interval (very low certainty).

1 finding from 1 review

Long protocol vs three weeks before stimulation

Live birth or ongoing pregnancy · women undergoing pituitary suppression in assisted reproduction

Long protocol: administration of GnRHa for two showed no clear difference in live birth and ongoing pregnancies per woman randomised compared with three weeks before stimulation (low certainty).

1 finding from 1 review

Long protocol vs three weeks before stimulation

Clinical pregnancy rate · women undergoing pituitary suppression in assisted reproduction

Long protocol: administration of GnRHa for two showed no clear difference in clinical pregnancies per woman randomised compared with three weeks before stimulation (low certainty).

1 finding from 1 review

Oral long‐chain omega‐3 PUFAs vs placebo or no treatment

Change in dry eye symptoms, measured using the OSDI score (ranging from 0 to 100 units, with a reduction in score indicating clinical improvement) at 1‐month (with actual · people with dry eyea

Oral long‐chain omega‐3 PUFAs (ie, EPA and DHA) showed no clear difference in change in dry eye symptoms, measured using the OSDI score (ranging… compared with placebo or no treatment (low certainty).

1 finding from 1 review

Oral long‐chain omega‐3 PUFAs vs placebo or no treatment

Change in ocular surface staining at 1‐month (with actual · people with dry eyea

Oral long‐chain omega‐3 PUFAs (ie, EPA and DHA) showed no clear difference in change in ocular surface staining at 1‐month (with actual compared with placebo or no treatment (low certainty).

1 finding from 1 review