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Search review questions

Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

780 questions in 55 reviews · Public Health

current versions
No studies 162 · 20.8%Ungraded 52 · 6.7%Very low 231 · 29.6%Low 191 · 24.5%Moderate 122 · 15.6%High 22 · 2.8%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
iron‐fortified wheat flour with or without other micronutrients added vs wheat flour (no added iron) with the same other micronutrients added
Diarrhoea (3 liquid stools in a single day) (only in children 2 to 11 years of age) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
iron‐fortified wheat flour with or without other micronutrients added vs wheat flour (no added iron) with the same other micronutrients added
Respiratory infections (as measured by trialists) (only in children 2 to 11 years of age) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
iron‐fortified wheat flour with or without other micronutrients added vs wheat flour (no added iron) with the same other micronutrients added
All‐cause death (only in children 2 to 11 years of age) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
no estimate extracted0 studies · 0 participantsUngraded
iron‐fortified wheat flour with or without other micronutrients added vs wheat flour (no added iron) with the same other micronutrients added
Infection or inflammation at individual level as measured by C‐reactive protein (CRP) (only in children 2 to 11 years of age) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
no estimate extracted2 studies · 558 participantsModerate
Iron‐fortified wheat flour with other micronutrients added vs unfortified wheat flour (no micronutrients added)
Anaemia (defined as haemoglobin below WHO cut‐off for age and adjusted for altitude as appropriate) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
RR 0.77 [0.41, 1.46]2 studies · 317 participantsVery low
Iron‐fortified wheat flour with other micronutrients added vs unfortified wheat flour (no micronutrients added)
Iron deficiency (as defined by study authors, based on a biomarker of iron status) · general population of all age groups (including pregnant women) from any country, over two years of age
Wheat flour fortification with iron and other micronutrients for reducing anaemia and improving iron status… (2021) · Cochrane
RR 0.73 [0.54, 0.99]3 studies · 382 participantsModerate
Intervention NR
Primary outcomes · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Sedentary time · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted7 studies · 397 participantsLow
Intervention NR
Secondary outcomes · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Physical function · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted2 studies · 98 participantsLow
Intervention NR
Waist circumference · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted2 studies · 100 participantsLow
Intervention NR
Systolic blood pressure · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted3 studies · 138 participantsVery low
Intervention NR
Diastolic blood pressure · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted3 studies · 138 participantsVery low
Intervention NR
Level of glucose in blood · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extracted2 studies · 100 participantsLow
Intervention NR
Adverse effects · Older adults living independently in the community
Interventions for reducing sedentary behaviour in community‐dwelling older adults (2021) · Cochrane
no estimate extractedNRNo studies
Summary of findings ‐ Interactive Social Media vs non‐interactive social media
Health behaviours · adults
Behavioural interventions delivered through interactive social media for health behaviour change, health… (2021) · Cochrane
no estimate extracted54 studies · 20139 participantsLow
Summary of findings ‐ Interactive Social Media vs non‐interactive social media
Body function · adults
Behavioural interventions delivered through interactive social media for health behaviour change, health… (2021) · Cochrane
no estimate extracted30 studies · 4521 participantsVery low
Summary of findings ‐ Interactive Social Media vs non‐interactive social media
Well‐being Outcomes ‐ General well‐being and Quality of life · adults
Behavioural interventions delivered through interactive social media for health behaviour change, health… (2021) · Cochrane
no estimate extracted16 studies · 3792 participantsLow
Summary of findings ‐ Interactive Social Media vs non‐interactive social media
Psychological outcomes ‐ Distress and Depression · adults
Behavioural interventions delivered through interactive social media for health behaviour change, health… (2021) · Cochrane
no estimate extracted12 studies · 2070 participantsLow
Summary of findings ‐ Interactive Social Media vs non‐interactive social media
Adverse events · adults
Behavioural interventions delivered through interactive social media for health behaviour change, health… (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Total daily moderate‐to‐vigorous physical activity (MVPA) · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extracted6 studies · 3036 participantsLow
Intervention NR
Proportion of care session spent in MVPA (% session spent in MVPA) · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extracted2 studies · 2236 participantsModerate
Intervention NR
Cardiovascular fitness (3‐minute endurance test) · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extracted1 study · 141 participantsVery low
Intervention NR
Cost‐effectiveness · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extracted1 study · 1 participantsModerate
Intervention NR
Adverse outcomes ‐ not reported · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Quality of life ‐ not reported · health problem or population
Interventions in outside‐school hours childcare settings for promoting physical activity amongst… (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Number or proportion of cases in the community
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Epidemic growth acceleration
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
Exportation growth rate
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
No contributing study
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Number or proportion of cases exported
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRModerate
Intervention NR
Time to outbreak
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Risk of outbreak
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
Number or proportion of cases detected
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Proportion of cases detected
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Positive predictive value (PPV)
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Proportion of secondary cases
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Number or proportion of imported or exported cases
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Proportion of imported cases
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
No contributing study.
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Days at risk of transmitting the infection into the community
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
Probability of releasing an infected individual into the community
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
Outcome category: cases avoided due to the measure
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRNo studies
Intervention NR
Number or proportion of cases in the community
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Proportion of imported cases
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Number or proportion of cases seeded by imported cases
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Probability of an imported case not infecting anyone
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Time to outbreak
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow
Intervention NR
Number or proportion of deaths
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRVery low
Intervention NR
Days at risk of transmitting the infection into the community
International travel‐related control measures to contain the COVID‐19 pandemic: a rapid review (2021) · Cochrane
no estimate extractedNRLow