What do systematic reviews say?

Intervention not reported

The review found no eligible studies for this question.

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intervention not reported

The intervention showed no clear difference in cannabis use (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 1.1 [0.69, 1.76]
  2 studies · 126 participants
  Moderate

Intervention not reported

The intervention probably leads to lower tobacco use (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.77 [0.6, 0.97]
  9 studies · 15354 participants
  Moderate

Intervention not reported

The intervention probably leads to lower alcohol use (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.72 [0.56, 0.92]
  8 studies · 8751 participants
  Moderate

Intervention not reported

The intervention showed no clear difference in cannabis use (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.79 [0.62, 1.01]
  5 studies · 4140 participants
  Moderate

Intervention not reported

The intervention showed no clear difference in illicit drug use (low certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.73 [0.5, 1.07]
  5 studies · 10266 participants
  Low

Intervention not reported

It is very uncertain whether the intervention changes antisocial behaviour (very low certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.79 [0.64, 0.97]
  11 studies · 17722 participants
  Very low

Intervention not reported

The intervention showed no clear difference in sexual risk behaviour (low certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.84 [0.63, 1.13]
  6 studies · 12633 participants
  Low

Intervention not reported

The intervention probably leads to higher physical activity (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 1.32 [1.16, 1.5]
  4 studies · 6441 participants
  Moderate

Intervention not reported

The intervention showed no clear difference in illicit drug use (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.94 [0.71, 1.25]
  3 studies · 638 participants
  Moderate

Intervention not reported

The intervention showed no clear difference in antisocial behaviour (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 1.21 [0.92, 1.6]
  4 studies · 764 participants
  Moderate

Intervention not reported

It is very uncertain whether the intervention changes vehicle‐related risk behaviour (very low certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.59 [0.14, 2.48]
  2 studies · 94 participants
  Very low

Intervention not reported

The intervention showed no clear difference in sexual risk behaviour (moderate certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 0.73 [0.49, 1.08]
  2 studies · 494 participants
  Moderate

Intervention not reported

The review found no eligible studies for this question.

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intervention not reported

The intervention showed no clear difference in tobacco use (low certainty).

• Individual‐, family‐, and school‐level interventions targeting multiple risk behaviours in young people 2018 · Cochrane Headline outcomes only
  OR 1.03 [0.32, 3.27]
  2 studies · 1549 participants
  Low

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

It is very uncertain whether provision of maize flour or maize flour products fortified with iron… changes anaemia (defined as haemoglobin (Hb) below WHO cut‐off, adjusted for… compared with unfortified maize flours or maize flour products (very low certainty).

• Fortification of maize flour with iron for controlling anaemia and iron deficiency in populations 2018 · Cochrane Headline outcomes only
  RR 0.9 [0.58, 1.4]
  2 studies · 1027 participants
  Very low

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

It is very uncertain whether provision of maize flour or maize flour products fortified with iron… changes iron deficiency (as defined by trialists, based on a biomarker of… compared with unfortified maize flours or maize flour products (very low certainty).

• Fortification of maize flour with iron for controlling anaemia and iron deficiency in populations 2018 · Cochrane Headline outcomes only
  RR 0.75 [0.49, 1.15]
  2 studies · 1102 participants
  Very low

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

• Fortification of maize flour with iron for controlling anaemia and iron deficiency in populations 2018 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 1144 participants
  Very low

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

• Fortification of maize flour with iron for controlling anaemia and iron deficiency in populations 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 584 participants
  Very low

Provision of maize flour or maize flour products fortified with iron plus other vitamins and minerals vs unfortified maize flours or maize flour products

The review found no eligible studies for this question.

• Fortification of maize flour with iron for controlling anaemia and iron deficiency in populations 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found