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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

164 questions in 26 reviews · Oral medicine and oral cancer

current versions
No studies 164 · 100%Ungraded 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Biperiden plus pilocarpine vs No treatment
Survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
Survival not reported.0 studiesNo studies
Palifermin vs Placebo
Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
None of the trials evaluating palifermin provided data on salivary flow rates.0 studiesNo studies
Zinc supplements vs Acupuncture
Outcome NR · Patients with taste disturbances (dysgeusia/hypogeusia; idiopathic, zinc-deficient, or secondary to chronic renal…
Interventions for managing taste disturbances (2017) · Cochrane
Authors' conclusions: We were unable to draw any conclusions regarding the superiority of zinc supplements or acupuncture as none of the trials compared these interventions.0 studiesNo studies
Keratinocyte growth factor (KGF; palifermin or repifermin), intravenous vs Placebo
Quality of life · Adults with cancer receiving treatment
Interventions for preventing oral mucositis in patients with cancer receiving treatment: cytokines and… (2017) · Cochrane
No studies reported this outcome (planned secondary outcome not measured by any study in the review)0 studiesNo studies
Biperiden plus pilocarpine vs No treatment
Side effects · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data were reported on side effects.0 studiesNo studies
Bethanechol vs Placebo
Survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No survival data were reported.0 studiesNo studies
Amifostine (intravenous) vs Amifostine (subcutaneous)
Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No salivary flow rate data related to routes of administration of amifostine were reported.0 studiesNo studies
Antiseptic mouthrinse vs Placebo
Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No quality of life data were reported.0 studiesNo studies
Selenium vs No intervention
Survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No survival data were reported.0 studiesNo studies
Bethanechol vs Placebo
Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on either quality of life or other oral related symptoms were reported.0 studiesNo studies
Amifostine (intravenous) vs Amifostine (subcutaneous)
Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on either quality of life or other oral related symptoms were reported.0 studiesNo studies
Antimicrobial lozenge vs Placebo
Survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No survival data were reported.0 studiesNo studies
Venalot Depot (coumarin plus troxerutin) vs Placebo
Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on either quality of life or other oral related symptoms were reported.0 studiesNo studies
Antiseptic mouthrinse vs Placebo
Survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No survival data were reported.0 studiesNo studies
Amifostine 200 mg/m2 three times weekly vs Amifostine 200 mg/m2 five times weekly
Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No salivary flow rate data related to the effectiveness of different doses of amifostine were reported.0 studiesNo studies
Antiseptic mouthrinse vs Placebo
Xerostomia · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on xerostomia were reported.0 studiesNo studies
Acupuncture vs Sham control (deactivated laser sham acupuncture)
Adverse events · Patients with idiopathic dysgeusia and hypogeusia
Interventions for managing taste disturbances (2017) · Cochrane
Results: The acupuncture trial (Brandt 2008) did not give any data on adverse events in either group.0 studiesNo studies
Acupuncture vs Sham control (deactivated laser sham acupuncture)
Taste acuity improvement · Patients with idiopathic dysgeusia and hypogeusia
Interventions for managing taste disturbances (2017) · Cochrane
Results: There were no data on taste acuity improvement in the included acupuncture trial (Brandt 2008).0 studiesNo studies
Bethanechol vs Artificial saliva
Quality of life · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on either quality of life or other oral related symptoms were reported.0 studiesNo studies
Selenium vs No intervention
Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on salivary flow rates were reported.0 studiesNo studies
Biperiden plus pilocarpine vs No treatment
Xerostomia · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No xerostomia data related to the effectiveness of biperiden and pilocarpine were reported (Rode 1999).0 studiesNo studies
Antimicrobial lozenge vs Placebo
Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy (2017) · Cochrane
No data on salivary flow rates were reported.0 studiesNo studies
Psychological therapies (cognitive therapy) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF8: No included study reported change in feeling of dryness.0 studiesNo studies
Benzodiazepines (topical clonazepam) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF3: No included studies reported change in feeling of dryness.0 studiesNo studies
Physical barriers (tongue protector) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF7: No included studies reported change in taste.0 studiesNo studies
NSAIDs (ketorolac oral rinse; systemic celecoxib) vs Placebo or no treatment
Improvement of histological features (not improved) · People with a diagnosis of oral leukoplakia
Interventions for treating oral leukoplakia to prevent oral cancer (2016) · Cochrane
SoF 3, Histological changes: 'Not measured'. Effects text: 'Histological changes were not among the outcomes in the studies testing NSAIDs.'0 studiesNo studies
Psychological therapies (cognitive therapy) vs Placebo
Change in quality of life (QoL) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF8: No included study reported change in QoL.0 studiesNo studies
Anticonvulsants (gabapentin) vs Placebo
Change in quality of life (QoL) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF2: No included studies reported change in QoL.0 studiesNo studies
Dietary supplements (alpha lipoic acid) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF5: No included studies reported change in feeling of dryness.0 studiesNo studies
Psychological therapies (cognitive therapy) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF8: No included study reported change in taste.0 studiesNo studies
Anticonvulsants (gabapentin) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF2: No included studies reported change in taste.0 studiesNo studies
Cholinergics (bethanechol) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF4: No included studies reported change in feeling of dryness.0 studiesNo studies
Cholinergics (bethanechol) vs Placebo
Change in quality of life (QoL) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF4: No included studies reported change in QoL.0 studiesNo studies
Psychological therapies (cognitive therapy) vs Placebo
Adverse effects · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF8: No included study reported the occurrence of adverse events.0 studiesNo studies
Bowman-Birk inhibitor vs Placebo or no treatment
Oral cancer development · People with a diagnosis of oral leukoplakia
Interventions for treating oral leukoplakia to prevent oral cancer (2016) · Cochrane
SoF 6 (Bowman-Birk inhibitor vs placebo), Cancer development: 'Not measured'. Effects text: 'Cancer development was not among the outcomes of the study testing the Bowman-Birk inhibitor (Armstrong 2013).'0 studiesNo studies
Cholinergics (bethanechol) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF4: No included studies reported change in taste.0 studiesNo studies
Surgical removal of the lesion (surgical excision, laser surgery, cryotherapy) vs Placebo or no treatment
Outcome NR · People with a diagnosis of oral leukoplakia
Interventions for treating oral leukoplakia to prevent oral cancer (2016) · Cochrane
'We did not identify any RCTs that compared surgical treatments with placebo or no treatment.' Three surgical RCTs were found (Chee 2013, Lopez-Jornet 2013, Schwarz 2005) but all excluded because they did not include a…NRNo studies
Antidepressants (trazodone) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF1: No included studies reported change in taste.0 studiesNo studies
Physical barriers (tongue protector) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF7: No included studies reported change in feeling of dryness.0 studiesNo studies
Electromagnetic radiation (low-level laser therapy) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF6: No included study reported change in feeling of dryness.0 studiesNo studies
Removal of predisposing habits (e.g. tobacco/alcohol cessation) vs Placebo or no treatment
Outcome NR · People with a diagnosis of oral leukoplakia
Interventions for treating oral leukoplakia to prevent oral cancer (2016) · Cochrane
'...nor did we identify any RCTs of risk factor cessation.' Removal of predisposing habits (e.g. smoking cessation) was a planned intervention; no eligible RCT found.NRNo studies
Electromagnetic radiation (low-level laser therapy) vs Placebo
Adverse effects · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF6: No included study reported the occurrence of adverse events.0 studiesNo studies
Anticonvulsants (gabapentin) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF2: No included studies reported change in feeling of dryness.0 studiesNo studies
Dietary supplements (alpha lipoic acid) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF5: No included studies reported change in taste.0 studiesNo studies
Antidepressants (trazodone) vs Placebo
Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF1: No included studies reported change in feeling of dryness.0 studiesNo studies
Electromagnetic radiation (low-level laser therapy) vs Placebo
Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such… · short-term (up to 3 months)
Interventions for treating burning mouth syndrome (2016) · Cochrane
SoF6: No included study reported change in taste.0 studiesNo studies
Parasympathomimetic drugs (choline esters, cholinesterase inhibitors) vs No treatment
Outcome NR · Patients with radiation-induced salivary gland dysfunction
Parasympathomimetic drugs for the treatment of salivary gland dysfunction due to radiotherapy (2015) · Cochrane
no estimate extracted0 studiesNo studies
Oral cryotherapy (ice chips, ice-cold water, ice cubes or crushed ice held in the mouth during cancer treatment) vs Control (no treatment or standard/usual oral care, e.g. saline rinse)
Number of days of treatment with opioid analgesics · All patients with cancer who are receiving treatment · Fluorouracil (5FU) treatment for solid cancers
Interventions for preventing oral mucositis in patients with cancer receiving treatment: oral cryotherapy (2015) · Cochrane
No studies in the 5FU subgroup assessed the number of days of treatment with opioid analgesics.0 studiesNo studies
EGFR monoclonal antibody (cetuximab or nimotuzumab) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Participant satisfaction · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
No included studies addressed participant satisfaction (review-wide gap).0 studiesNo studies
EGFR monoclonal antibody (cetuximab or nimotuzumab) plus standard therapy (radiotherapy or chemoradiotherapy) vs Standard therapy alone (radiotherapy or chemoradiotherapy)
Direct and indirect costs to participants and health services · People with squamous cell carcinoma of the oral cavity or oropharynx · 24 to 70 months
Interventions for the treatment of oral and oropharyngeal cancers: targeted therapy and immunotherapy (2015) · Cochrane
No included studies addressed direct and indirect costs to participants and health services (review-wide gap).0 studiesNo studies