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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.

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Intervention or exposure

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Review versions

1,361 questions in 120 reviews · Developmental, Psychosocial and Learning Problems

current versions

No studies 286 · 21%Ungraded 61 · 4.5%Very low 381 · 28%Low 381 · 28%Moderate 228 · 16.8%High 24 · 1.8%

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.

Question	Effect	Evidence	Status / GRADE
Intermittent vs daily use of iron supplements Haemoglobin (g/L) · children under 12 years of age Intermittent iron supplementation for improving nutrition and development in children under 12 years of age (2011) · Cochrane	no estimate extracted	19 studies · 2851 participants	Low
Intermittent vs daily use of iron supplements Iron deficiency (using ferritin concentrations) · children under 12 years of age Intermittent iron supplementation for improving nutrition and development in children under 12 years of age (2011) · Cochrane	RR 4 [1.23, 13.05]	1 study · 76 participants	Very low
Intervention NR Aggression OAS, OAS‐M, MOAS, self‐reported incidents, CPRS subscale (endpoints fall between 2 weeks and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	12 studies · 606 participants	Moderate
Intervention NR Impulsivity Q‐sort, Porteus Maze Test (endpoints fall between 2 weeks and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	2 studies · 43 participants	Very low
Intervention NR Hostility BPRS hostility sub scale, CPRS hostility subscale, Q‐sort, speech content analysis (endpoints fall between 1 and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	4 studies · 143 participants	Low
Intervention NR Anger Self‐reported outbursts, Rosenweig Picture Frustration Test (endpoints fall between 2 weeks and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	2 studies · 46 participants	Low
Intervention NR Anger‐Hostility POMS anger‐hostility subscale (endpoints fall between 1 and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	3 studies · 125 participants	Low
Intervention NR Non‐compliance leaving the study early (endpoints fall between 1 and 6 months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	6 studies · 411 participants	Moderate
Intervention NR Adverse events, any (endpoints fall between 1 6 six months) · Any individual experiencing recurrent aggressive outbursts or episodes Antiepileptics for aggression and associated impulsivity (2010) · Cochrane	no estimate extracted	3 studies · 300 participants	Moderate
Meditation therapy vs drug therapy Teacher rating ADHD overall scale The Abbreviated Parent‐Teacher Questionnaire (Conners, 1973) · patients with attention deficit /hyperactivity disorder Meditation therapies for attention‐deficit/hyperactivity disorder (ADHD) (2010) · Cochrane	no estimate extracted	1 study · 15 participants	Very low
meditation therapy vs standard treatment without drug Teacher rating ADHD overall scale Abbreviated Parent‐Teacher Questionnaire (Conner, 1973) · patients with attention deficit /hyperactivity disorder Meditation therapies for attention‐deficit/hyperactivity disorder (ADHD) (2010) · Cochrane	no estimate extracted	1 study · 17 participants	Very low