Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,462 questions · 1,520 findings · 156 reviews

No studies found 364 · 23.9%GRADE not reported 108 · 7.1%Very low 455 · 29.9%Low 374 · 24.6%Moderate 193 · 12.7%High 26 · 1.7%

Effects of extensive instructions vs simple instructions

PAR pass rate (%) ‐ Fit testing of foam earplugs (immediate) · workers exposed to noise using HPDs

Effects of extensive instructions probably leads to higher PAR pass rate (%) ‐ Fit testing of foam earplugs (immediate) compared with simple instructions (moderate certainty).

1 finding from 1 review

Intervention not reported

Breast cancer stage at the time of presentation: defined as the proportion of women with breast cancer diagnosed at early stage (stage 0, I, II) Time of outcome assessment: 3 years to 20 years Method of measurement: CBE · health workers

The intervention may leads to higher breast cancer stage at the time of presentation: defined as the… (low certainty).

1 finding from 1 review

Intervention not reported

Breast cancer stage at the time of presentation: defined as the proportion of women with breast cancer diagnosed at late stage (stage III, IV) Time of outcome assessment: 3 years to 20 years Method of measurement: CBE · health workers

The intervention may leads to lower breast cancer stage at the time of presentation: defined as the… (low certainty).

1 finding from 1 review

Intervention not reported

Breast cancer mortality: defined as deaths among women who received a diagnosis of breast cancer Time of outcome assessment: 3 years to 20 years Method of measurement: death registration offices, hospital records, and house visits · health workers

It is very uncertain whether the intervention changes breast cancer mortality: defined as deaths among women who received… (very low certainty).

1 finding from 1 review

Intervention not reported

Activities of daily living (primary outcome) · participants after stroke
1 finding from 1 review

Intervention not reported

Arm‐hand activity · participants after stroke
1 finding from 1 review

Intervention not reported

Standing balance · participants after stroke
1 finding from 1 review

Intervention not reported

Walking ability · participants after stroke
1 finding from 1 review

Intervention not reported

Quality of life after stroke · participants after stroke
1 finding from 1 review

Intervention not reported

Death and serious adverse events, including falls · participants after stroke
1 finding from 1 review

Intervention not reported

Trunk function · participants after stroke
1 finding from 1 review

Intervention not reported

Arm‐hand activity · participants after stroke
1 finding from 1 review

Intervention not reported

Standing balance · participants after stroke
1 finding from 1 review

Intervention not reported

Walking ability · participants after stroke
1 finding from 1 review

Intervention not reported

Quality of life after stroke · participants after stroke
1 finding from 1 review

Intervention not reported

Death and serious adverse events, including falls · participants after stroke
1 finding from 1 review