Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

87 questions · 97 findings · 30 reviews · All outcomes

No studies found 37 · 38.1%GRADE not reported 55 · 56.7%Very low 0 · 0%Low 1 · 1%Moderate 1 · 1%High 3 · 3.1%

Younger children's age (3-5 years) vs Older children (>5 years)

Poor oral health-related quality of life (OHRQoL) · Children aged 3-12 years

Children aged 3 years had higher odds of poor OHRQoL than older children (OR 2.00, 95% CI 1.42-2.57; 2 studies; ungraded).

2 findings from 1 review

Older age vs Younger adults (population mean age <=33.4 years)

Oral health-related quality of life · Adolescents (10-19 years)

The abstract reports older age is associated with worse OHRQoL, but the body notes the evidence on age is limited and conflicting (narrative synthesis; no pooled estimate or GRADE rating).

2 findings from 1 review

Dental (tooth) agenesis vs No dental agenesis

Oral health-related quality of life · Adolescents (10-19 years)

The umbrella review reported insufficient scientific evidence to support an association between dental agenesis and oral health-related quality of life.

2 findings from 1 review

Low maternal education (<=6 years of schooling) vs Higher maternal education (>6 years)

Poor oral health-related quality of life (OHRQoL) · Children aged 3-12 years

Lower maternal education was associated with poor OHRQoL (OR 1.12, 95% CI 1.00-1.23; 4 studies; high heterogeneity; CI lower bound at the null; ungraded).

1 finding from 1 review

Flossing plus toothbrushing (self-performed; manual or automated floss) vs Toothbrushing alone

Quality of life · Dentate adults aged 16 years or older (excluding orthodontic patients and those with severe periodontal disease)

The review found no eligible studies for this question.

1 finding from 1 review

Double primary (canine and first molar) tooth extraction vs Single primary (canine) tooth extraction

Patient‐reported outcome measures (PROMs) · Young people aged 9 to 14 years diagnosed with one or both palatally displaced permanent maxillary canines (PDC)

The review found no eligible studies for this question.

1 finding from 1 review

Mechanical tongue cleaning (tongue scraper) vs No tongue cleaning

Quality of life · Adolescents and adults aged over 16 years with clinical or self-assessed halitosis of oral origin; excluding induced or physiological…

The review found no eligible studies for this question.

1 finding from 1 review
  • Interventions for managing halitosis 2019 · Cochrane All outcomes
    Quality of life was a prespecified secondary outcome. None of the 44 included studies in the review (across all comparisons) reported quality-of-life data (review-wide evidence gap).
    0 studies
    No studies found

Hyperbaric oxygen therapy plus standard care (surgery, antibiotics, oral rinse) vs Standard care alone (surgery, antibiotics, oral rinse)

Quality of life · People with BRONJ (mean age ~66 years; most treated with bisphosphonates for cancer (multiple myeloma, breast cancer) or osteoporosis)
1 finding from 1 review

Visual screening (oral visual inspection) by trained health workers vs No screening

Quality of life · Apparently healthy adults aged 35 years or older (general population), living in 13 clusters in rural areas of Trivandrum city, Kerala,…

The review found no eligible studies for this question.

1 finding from 1 review

Minimal incision palatopharyngoplasty (MIPP) vs MIPP with additional individualised velopharyngeal surgery (pharyngeal flap or sphincter pharyngoplasty)

Quality of life (validated questionnaire) · Children or adolescents aged 3 years or older with velopharyngeal insufficiency (VPI) associated with non-syndromic submucous cleft palate

The review found no eligible studies for this question.

1 finding from 1 review

Orthodontic treatment with appliances inducing stable, permanent orthodontic tooth movement (splints worn 8 to 12 weeks and surgical interventions excluded) vs Control: no treatment, placebo, or reassurance

Patient quality of life · Adults aged 18 years or older with clinically diagnosed TMD (exhibiting two or more of the listed signs and/or symptoms)

The review found no eligible studies for this question.

1 finding from 1 review