Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

401 questions · 403 findings · 75 reviews · Headline outcomes only

No studies found 79 · 19.6%GRADE not reported 18 · 4.5%Very low 91 · 22.6%Low 110 · 27.3%Moderate 79 · 19.6%High 26 · 6.5%

Fortification of salt with iron and iodine vs fortification of salt with iodine

Anaemia prevalence · participants were of any age or sex and from any country, regardless of baseline iron and iodine status

Fortification of salt with iron and iodine probably leads to lower prevalence of anaemia compared with fortification of salt with iodine (moderate certainty).

1 finding from 1 review

Fortification of salt with iron and iodine vs fortification of salt with iodine

Prevalence of iron deficiency anaemia · participants were of any age or sex and from any country, regardless of baseline iron and iodine status

Fortification of salt with iron and iodine may leads to lower prevalence of iron deficiency anaemia compared with fortification of salt with iodine (low certainty).

1 finding from 1 review

Combination of lidocaine intraperitoneal instillation plus intramuscular morphine vs lidocaine intraperitoneal instillation alone

Number of women requiring rescue medication · women undergoing PPTL under local anaesthesia

Combination of lidocaine intraperitoneal instillation plus… showed no clear difference in number of women requiring rescue medication compared with lidocaine intraperitoneal instillation alone (low certainty).

1 finding from 1 review

Scheduled surveillance vs clinical monitoring alone

Access thrombosis/vascular complication · people receiving haemodialysis to treat kidney failure and using a functioning AV access for haemodialysis.

Scheduled surveillance showed no clear difference in risk of access thrombosis compared with clinical monitoring alone (moderate certainty).

1 finding from 1 review

Scheduled surveillance vs clinical monitoring alone

Risk of access loss · people receiving haemodialysis to treat kidney failure and using a functioning AV access for haemodialysis.

Scheduled surveillance showed no clear difference in risk of access loss compared with clinical monitoring alone (moderate certainty).

1 finding from 1 review

TACE followed by 3‐DCRT vs chemoembolisation

Non‐serious adverse events: leukopenia · primary hepatocellular carcinoma

It is very uncertain whether TACE followed by 3‐DCRT changes non‐serious adverse events: leukopenia compared with TACE (very low certainty).

1 finding from 1 review

TACE followed by 3‐DCRT vs chemoembolisation

Non‐serious adverse events: serum transaminases elevation · primary hepatocellular carcinoma

It is very uncertain whether TACE followed by 3‐DCRT changes non‐serious adverse events: serum transaminases elevation compared with TACE (very low certainty).

1 finding from 1 review