Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,587 questions · 5,761 findings · 495 reviews

No studies found 1,011 · 17.5%GRADE not reported 1,797 · 31.2%Very low 1,100 · 19.1%Low 1,052 · 18.3%Moderate 649 · 11.3%High 152 · 2.6%

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Any form of one-to-one oral hygiene advice (OHA) vs No OHA

Dental caries · Children or adults (fit and healthy, or with a well-defined medical condition)

It is very uncertain whether any form of one-to-one oral hygiene advice (OHA) changes dental caries compared with no OHA (very low certainty).

1 finding from 1 review

Any form of one-to-one oral hygiene advice (OHA) vs No OHA

Gingivitis · Children or adults (fit and healthy, or with a well-defined medical condition)

It is very uncertain whether any form of one-to-one oral hygiene advice (OHA) changes periodontal health: gingivitis compared with no OHA (very low certainty).

1 finding from 1 review

Any form of one-to-one oral hygiene advice (OHA) vs No OHA

Patient-reported changes in knowledge, attitudes and quality of life · Children or adults (fit and healthy, or with a well-defined medical condition)
1 finding from 1 review

Any form of one-to-one oral hygiene advice (OHA) vs No OHA

Plaque · Children or adults (fit and healthy, or with a well-defined medical condition)

Any form of one-to-one oral hygiene advice (OHA) showed no clear difference in periodontal health: plaque levels compared with no OHA (low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

Definite necrotizing enterocolitis (NEC) during study period · preventing necrotizing enterocolitis in preterm and low birth weight neonates

Summary of findings table for oral immunoglobulin showed no clear difference in definite necrotizing enterocolitis (NEC) during study period compared with control (low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

Definite necrotizing enterocolitis (NEC) during study period ‐ IgA/IgG · preventing necrotizing enterocolitis in preterm and low birth weight neonates

It is very uncertain whether summary of findings table for oral immunoglobulin changes definite necrotizing enterocolitis (NEC) during study period ‐ IgA/IgG compared with control (very low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

Definite necrotizing enterocolitis (NEC) during study period ‐ IgG · preventing necrotizing enterocolitis in preterm and low birth weight neonates

Summary of findings table for oral immunoglobulin showed no clear difference in definite necrotizing enterocolitis (NEC) during study period ‐ IgG compared with control (low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

Definite NEC after study period · preventing necrotizing enterocolitis in preterm and low birth weight neonates

It is very uncertain whether summary of findings table for oral immunoglobulin changes definite NEC after study period compared with control (very low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

NEC‐related surgery during study period · preventing necrotizing enterocolitis in preterm and low birth weight neonates

It is very uncertain whether summary of findings table for oral immunoglobulin changes NEC‐related surgery during study period compared with control (very low certainty).

1 finding from 1 review

Summary of findings table for oral immunoglobulin vs control

NEC‐related deaths during study period · preventing necrotizing enterocolitis in preterm and low birth weight neonates

It is very uncertain whether summary of findings table for oral immunoglobulin changes NEC‐related deaths during study period compared with control (very low certainty).

1 finding from 1 review

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Daytime symptom: thirstiness in the morning (questionnaire) · Children with obstructive sleep apnoea (aged 15 years or younger)

Oral appliance or functional orthopaedic appliance showed no clear difference in daytime symptom: thirstiness in the morning (questionnaire) compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Reduction of apnoea episodes (apnoea-hypopnoea index) · Children with obstructive sleep apnoea (aged 15 years or younger)

It is very uncertain whether oral appliance or functional orthopaedic appliance changes reduction of apnoea episodes (apnoea-hypopnoea index) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Nocturnal symptom: nightmares (questionnaire) · Children with obstructive sleep apnoea (aged 15 years or younger)

Oral appliance or functional orthopaedic appliance showed no clear difference in nocturnal symptom: nightmares (questionnaire) compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Oral appliance or functional orthopaedic appliance vs placebo or no treatment

Tiredness · Children with obstructive sleep apnoea (aged 15 years or younger)

It is very uncertain whether oral appliance or functional orthopaedic appliance changes daytime symptom: tiredness (Brouillette questionnaire) compared with placebo or no treatment (very low certainty).

1 finding from 1 review