Cognitive function · infants and children
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Intelligence quotient · infants and children
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse effects · infants and children
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Preterm birth · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in preterm birth (< 37 weeks) compared with no zinc (with or without placebo) (low certainty).
1 finding from 1 review
Stillbirth · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in stillbirth compared with no zinc (with or without placebo) (low certainty).
1 finding from 1 review
Neonatal mortality · Pregnant women (healthy and probable zinc deficiency)
It is very uncertain whether zinc supplementation changes neonatal death compared with no zinc (with or without placebo) (very low certainty).
1 finding from 1 review
Perinatal mortality · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in perinatal death compared with no zinc (with or without placebo) (low certainty).
1 finding from 1 review
Birthweight (g) · Pregnant women (healthy and probable zinc deficiency)
1 finding from 1 review
Small‐for‐gestational age or IUGR · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in small‐for‐gestational age or IUGR compared with no zinc (with or without placebo) (moderate certainty).
1 finding from 1 review
Low birthweight · Pregnant women (healthy and probable zinc deficiency)
Zinc supplementation showed no clear difference in low Birthweight (< 2500 g) compared with no zinc (with or without placebo) (moderate certainty).
1 finding from 1 review
QoL of participants living with SCD and their caregivers · people with sickle cell disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse effects · people with sickle cell disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Frequency of hospitalization · people with sickle cell disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Frequency of sickle cell‐related complications: number of participants with completely healed leg ulcer ( · people with sickle cell disease
It is very uncertain whether zinc changes frequency of sickle cell‐related complications: number of… compared with placebo (very low certainty).
1 finding from 1 review
Haemoglobin status · people with sickle cell disease
Zinc may leads to higher haemoglobin status (g/dL) compared with placebo (low certainty).
1 finding from 1 review
Frequency of crisis · people with sickle cell disease
Zinc showed no clear difference in frequency of crisis compared with placebo (low certainty).
1 finding from 1 review
Severity of pain · people with sickle cell disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Progression to late AMD (neovascular AMD, geographic atrophy or both) · people with AMD
Zinc probably leads to lower progression to late AMD (neovascular AMD, geographic atrophy or both) compared with placebo (moderate certainty).
1 finding from 1 review
Progression to neovascular AMD · people with AMD
Zinc probably leads to lower progression to neovascular AMD compared with placebo (moderate certainty).
1 finding from 1 review
Progression to geographic atrophy · people with AMD
Zinc showed no clear difference in progression to geographic atrophy compared with placebo (moderate certainty).
1 finding from 1 review