Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

249 questions · 255 findings · 18 reviews · Headline outcomes only

No studies found 68 · 26.7%GRADE not reported 5 · 2%Very low 102 · 40%Low 44 · 17.3%Moderate 32 · 12.5%High 4 · 1.6%

Transmyocardial laser revascularization vs medical treatment

Angina reduction ‐ NYHA scale Decrease in two angina classes or more · patients with refractory angina

Transmyocardial laser revascularization may leads to higher angina reduction Decrease in two angina classes or more compared with medical treatment (low certainty).

2 findings from 1 review

Transmyocardial laser revascularization vs medical treatment

Angina reduction ‐ CCS score Decrease in two angina classes or more · patients with refractory angina

Transmyocardial laser revascularization may leads to higher angina reduction ‐ CCS score Decrease in two angina classes or more compared with medical treatment (low certainty).

1 finding from 1 review

Transmyocardial laser revascularization vs medical treatment

Early postoperative mortality Deaths in the 30 days after surgery · patients with refractory angina

Transmyocardial laser revascularization showed no clear difference in early postoperative mortality Deaths in the 30 days after surgery compared with medical treatment (high certainty).

1 finding from 1 review

Endovenous laser ablation (EVLA) vs foam sclerotherapy

Technical success · people with GSV incompetence

Endovenous laser ablation (EVLA) showed no clear difference in technical success (< 5 years) compared with ultrasound‐guided foam sclerotherapy (UGFS) (low certainty).

2 findings from 1 review

Summary of findings table ‐ Other therapies (cryotherapy) vs other therapies (fractional CO2 laser)

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

It is very uncertain whether summary of findings table ‐ Other therapies (cryotherapy) changes short‐term hair regrowth ≥ 75% compared with other therapies (fractional CO2 laser) (very low certainty).

1 finding from 1 review