Findings

What do systematic reviews say?

40 questions · 40 findings · 2 reviews

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No studies found 8 · 20%GRADE not reported 13 · 32.5%Very low 14 · 35%Low 5 · 12.5%Moderate 0 · 0%High 0 · 0%

Preconception care vs usual care

Pregnancy · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
1 study · 109 participants
Very low

Preconception care vs usual care

Mortality or morbidity composite · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Babies born with congenital malformations · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Adiposity · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Type 1 or 2 diabetes · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Neurosensory disability · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Hypertensive disorders of pregnancy · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Caesarean section · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Perineal trauma · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Gestational weight gain · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Cardiovascular health · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Induction of labour · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Large‐for‐gestational age · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception care vs usual care

Perinatal mortality · adolescent girls with type 1 or 2 diabetes

1 finding from 1 review

Preconception care for diabetic women for improving maternal and infant health 2017 · Cochrane Headline outcomes only
no estimate extracted
0 studies · 0 participants
GRADE not reported

Preconception lifestyle advice on weight vs usual care or attention control

Adverse events: hypertension · women with infertility and obesity

It is very uncertain whether preconception lifestyle advice on weight changes adverse events ‐ Hypertension compared with routine care or attention control (very low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 1.07 [0.66, 1.75]
1 study · 317 participants
Very low

Preconception lifestyle advice on weight vs usual care or attention control

Adverse events ‐ Gestational diabetes · women with infertility and obesity

It is very uncertain whether preconception lifestyle advice on weight changes adverse events ‐ Gestational diabetes compared with routine care or attention control (very low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 0.78 [0.48, 1.26]
1 study · 317 participants
Very low

Preconception lifestyle advice on weight vs usual care or attention control

Miscarriage · women with infertility and obesity

It is very uncertain whether preconception lifestyle advice on weight changes miscarriage compared with routine care or attention control (very low certainty).

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
RR 1.5 [0.95, 2.37]
1 study · 577 participants
Very low

Preconception lifestyle advice on weight vs usual care or attention control

Reported behavioural changes in weight: BMI (measured "at study end" ‐ 3 months) · women with infertility and obesity

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
no estimate extracted
1 study · 574 participants
Low

Preconception lifestyle advice on weight vs usual care or attention control

Reported behavioural changes in weight: percentage of weight loss (measured at 6 months) · women with infertility and obesity

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
no estimate extracted
2 studies · 380 participants
Very low

Preconception lifestyle advice on weight vs usual care or attention control

Reported behavioural changes in diet: vegetable intake · women with infertility and obesity

1 finding from 1 review

Preconception lifestyle advice for people with infertility 2021 · Cochrane Headline outcomes only
no estimate extracted
1 study · 250 participants
Very low