Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,104 questions · 1,200 findings · 23 reviews · Oral medicine and oral cancer

No studies found 143 · 11.9%GRADE not reported 760 · 63.3%Very low 201 · 16.8%Low 66 · 5.5%Moderate 29 · 2.4%High 1 · 0.1%

Zinc vs placebo

Taste acuity improvement - objective outcome (dichotomous data) · Patients with taste disturbances (dysgeusia/hypogeusia; idiopathic, zinc-deficient, or secondary to chronic renal failure)

It is very uncertain whether zinc supplements (zinc sulphate, zinc gluconate, zinc picolinate,… changes taste acuity improvement - objective outcome (dichotomous data) compared with placebo (very low certainty).

1 finding from 1 review

Biperiden plus pilocarpine vs no treatment

Dysphagia (WHO grade 3+) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Biperiden plus pilocarpine showed no clear difference in dysphagia (WHO grade 3+) compared with no treatment; GRADE not reported.

1 finding from 1 review

Acupuncture vs sham control

Adverse events · Patients with idiopathic dysgeusia and hypogeusia

The review found no eligible studies for this question.

1 finding from 1 review

Amifostine vs no treatment/placebo

Quality of life (Patient Benefit Questionnaire, 10-point scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

It is very uncertain whether amifostine changes quality of life (Patient Benefit Questionnaire, 10-point scale) compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Biperiden plus pilocarpine vs no treatment

Salivary flow rate (unstimulated) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
1 finding from 1 review

Epidermal growth factor (EGF), oral spray vs placebo

Normalcy of diet (total parenteral nutrition) · Adults with cancer receiving treatment

Epidermal growth factor (EGF), oral spray showed no clear difference in normalcy of diet (total parenteral nutrition) compared with placebo; GRADE not reported.

1 finding from 1 review

Biperiden plus pilocarpine vs no treatment

Dry mouth (xerostomia) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

The review found no eligible studies for this question.

1 finding from 1 review

NSAIDs (ketorolac oral rinse; systemic celecoxib) 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 3, Clinical resolution (not completely resolved) at 3 months: '1 study evaluated systemic treatment and 1 evaluated topical treatment. Neither found benefit for NSAIDs.' No GRADE. Effects text: celecoxib…
    2 studies
    GRADE not reported

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

NSAIDs (ketorolac oral rinse; systemic celecoxib) vs placebo or no treatment

Safety of the intervention (adverse effects) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • SoF 3, Safety of the intervention over 3 months: systemic celecoxib (1 study) - 32 intervention participants reported 56 adverse effects, 20 placebo participants reported 20; 4 grade 3 events; 2 discontinued. Ketorolac…
    2 studies
    GRADE not reported

NSAIDs (ketorolac oral rinse; systemic celecoxib) vs placebo or no treatment

Improvement of histological features (not improved) · People with a diagnosis of oral leukoplakia

The review found no eligible studies for this question.

1 finding from 1 review

Topical bleomycin vs placebo or no treatment

Safety of the intervention (adverse effects) · 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
    up to 3 months
    SoF 5, Safety of the intervention up to 3 months: 'All patients in the bleomycin group developed erythema with erosion by the end of the applications, whereas erythema developed in the placebo group. Discomfort was…
    1 study
    GRADE not reported

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