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Evidence found and GRADE certainty

4,756 questions · 13,493 findings · 1,305 reviews · Headline outcomes only

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No studies found 2,594 · 19.2%GRADE not reported 728 · 5.4%Very low 2,868 · 21.3%Low 3,777 · 28%Moderate 2,620 · 19.4%High 906 · 6.7%

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Tranexamic acid vs placebo

Risk of receiving any allogeneic blood product (data only available for intraoperative blood product use) · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Tranexamic acid changes risk of receiving any allogeneic blood product (data only available… compared with placebo (very low certainty).

1 finding from 1 review

Tranexamic acid vs placebo

Risk of reoperation or repeat procedure for bleeding within 7 days · people aged 18 and over undergoing vascular surgery

It is very uncertain whether summary of findings: Tranexamic acid changes risk of reoperation or repeat procedure for bleeding within 7 days compared with placebo (very low certainty).

1 finding from 1 review

Tranexamic acid vs placebo

Risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) · people aged 18 and over undergoing vascular surgery

Summary of findings: Tranexamic acid showed no clear difference in risk of a thrombotic/thromboembolic event (MI, CVA, DVT, PE) compared with placebo (low certainty).

1 finding from 1 review

Tenofovir‐based antiviral combination regimens vs placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens

All‐cause infant mortality at longest · HIV‐positive pregnant women co‐infected with hepatitis B virus

It is very uncertain whether tenofovir‐based antiviral combination regimens changes all‐cause infant mortality at longest compared with placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens (very low certainty).

1 finding from 1 review

Tenofovir‐based antiviral combination regimens vs placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens

Proportion of infants with serious adverse events ( · HIV‐positive pregnant women co‐infected with hepatitis B virus

It is very uncertain whether tenofovir‐based antiviral combination regimens changes proportion of infants with serious adverse events ( compared with placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens (very low certainty).

1 finding from 1 review

Tenofovir‐based antiviral combination regimens vs placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens

Proportion of infants with HBV mother‐to‐child transmission · HIV‐positive pregnant women co‐infected with hepatitis B virus
1 finding from 1 review

Tenofovir‐based antiviral combination regimens vs placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens

Proportion of mothers with serious adverse events ( · HIV‐positive pregnant women co‐infected with hepatitis B virus

It is very uncertain whether tenofovir‐based antiviral combination regimens changes proportion of mothers with serious adverse events ( compared with placebo or tenofovir alone or non‐tenofovir‐based antiviral regimens (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Oral classical immunosuppressants (prednisolone or cyclosporine) vs placebo

Short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of · adults with alopecia areata

It is very uncertain whether summary of findings table ‐ Oral classical immunosuppressants… changes short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of compared with placebo (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Subcutaneous biologics (dupilumab) vs placebo

Short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of · adults with alopecia areata

Summary of findings table ‐ Subcutaneous biologics (dupilumab) showed no clear difference in short‐term hair regrowth ≥ 75% compared with placebo (low certainty).

1 finding from 1 review