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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Neuromuscular electrical stimulation + other intervention (e.g. exercise) vs other intervention alone

Kujala patellofemoral disorders score Scale from: 0 to 100 (higher scores = better function) · patients with patellofemoral pain syndrome (symptoms > 4 weeks (1 study); symptoms > 6 weeks (1 study); symptoms > 8 weeks (1 study); not…
1 finding from 1 review

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic acid, acitretin) vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia

It is very uncertain whether vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic… changes oral cancer development compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Topical bleomycin vs placebo or no treatment

Clinical resolution (oral lesion not completely resolved) · People with a diagnosis of oral leukoplakia

It is very uncertain whether topical bleomycin changes clinical resolution (oral lesion not completely resolved) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic acid, acitretin) vs placebo or no treatment

Clinical resolution (oral lesion not completely resolved) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • Interventions for treating oral leukoplakia to prevent oral cancer 2016 · Cochrane All outcomes
    4 to 12 months
    SoF 1, Clinical resolution (not completely resolved) at 4 to 12 months: 'Studies could not be combined in meta-analysis. One study evaluated topical treatment and did not find evidence of benefit; 3 studies of systemic…
    4 studies
    GRADE not reported

Herbal extracts (tea components; Chinese herbal mixture; freeze-dried black raspberry gel) vs placebo or no treatment

Clinical resolution (oral lesion not completely resolved) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • SoF 4, Clinical resolution (not completely resolved) at 3 to 6 months: '3 studies (freeze-dried black raspberry gel, green tea extract capsules, mixed tea) did not find evidence of benefit.' No GRADE. Effects text:…
    4 studies
    GRADE not reported

Systemic beta carotene or carotenoids (incl. lycopene) vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia

It is very uncertain whether systemic beta carotene or carotenoids (incl. lycopene) changes oral cancer development compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Herbal extracts (tea components; Chinese herbal mixture; freeze-dried black raspberry gel) vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • SoF 4 (Herbal extracts vs placebo), Cancer development: SoF cell 'Not measured'. Effects text: cancer development was among the outcomes in Tsao 2009 (green tea extract) but it was not possible to analyse the data…
    1 study
    GRADE not reported

Bowman-Birk inhibitor vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia

The review found no eligible studies for this question.

1 finding from 1 review

Systemic beta carotene or carotenoids (incl. lycopene) vs placebo or no treatment

Clinical resolution (oral lesion not completely resolved) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • Interventions for treating oral leukoplakia to prevent oral cancer 2016 · Cochrane All outcomes
    5 to 12 months
    SoF 2, Clinical resolution (not completely resolved) at 5 to 12 months: 'The 3 studies could not be combined in meta-analysis. 2 found benefit for systemic beta carotene, and 1 did not.' No GRADE rating. Effects text…
    3 studies
    GRADE not reported

Systemic interventions (aciclovir, thalidomide, corticosteroids, rebamipide, etanercept, colchicine, interferon-alpha) vs placebo

Episode duration associated with oral ulcers · People with Behcet's disease with a history of recurrent oral aphthous-type (RAS-type) ulcers diagnosed clinically; primary care
1 finding from 1 review
  • SoF 2 (systemic interventions vs placebo), grouped comment spanning all four listed outcomes (verbatim; the review's wording "topical" is a typo for systemic): "8 placebo-controlled trials evaluated topical…
    Studies not reported
    GRADE not reported

Colchicine (systemic; 0.5 mg weight-adjusted daily) vs placebo

Total number of oral ulcers · People with Behcet's disease with a history of recurrent oral aphthous-type (RAS-type) ulcers diagnosed clinically; primary care

Colchicine (systemic; 0.5 mg weight-adjusted daily) showed no clear difference in total number of oral ulcers compared with placebo (moderate certainty).

1 finding from 1 review