Findings

What do systematic reviews say?

5 questions · 5 findings · 1 reviews · Pregnancy and Childbirth

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No studies found 1 · 20%GRADE not reported 0 · 0%Very low 2 · 40%Low 2 · 40%Moderate 0 · 0%High 0 · 0%

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Child adverse effect: hyperthyroidism · women during the preconception, pregnancy and postpartum period

The review found no eligible studies for this question.

1 finding from 1 review

Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Low birthweight · women during the preconception, pregnancy and postpartum period

Any supplement containing iodine showed no clear difference in low birthweight compared with same supplement without iodine or no treatment/placebo (child… (low certainty).

1 finding from 1 review

Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · Cochrane Headline outcomes only
RR 0.56 [0.26, 1.23]
2 studies · 377 participants
Low

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Neonatal hypothyroidism or elevated TSH · women during the preconception, pregnancy and postpartum period

It is very uncertain whether any supplement containing iodine changes neonatal hypothyroidism or elevated TSH compared with same supplement without iodine or no treatment/placebo (child… (very low certainty).

1 finding from 1 review

Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · Cochrane Headline outcomes only
RR 0.58 [0.11, 3.12]
1 study · 219 participants
Very low

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Neonatal adverse effect: elevated TPO‐ab · women during the preconception, pregnancy and postpartum period

It is very uncertain whether any supplement containing iodine changes neonatal adverse effect: elevated TPO‐ab compared with same supplement without iodine or no treatment/placebo (child… (very low certainty).

1 finding from 1 review

Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · Cochrane Headline outcomes only
RR 0.61 [0.07, 5.7]
1 study · 108 participants
Very low

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Perinatal mortality · women during the preconception, pregnancy and postpartum period

Any supplement containing iodine showed no clear difference in perinatal mortality compared with same supplement without iodine or no treatment/placebo (child… (low certainty).

1 finding from 1 review

Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · Cochrane Headline outcomes only
RR 0.66 [0.42, 1.03]
1 study · 399 participants
Low