Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,348 questions · 1,514 findings · 111 reviews · All outcomes

No studies found 287 · 19%GRADE not reported 823 · 54.4%Very low 243 · 16.1%Low 104 · 6.9%Moderate 49 · 3.2%High 8 · 0.5%

Epidermal growth factor (EGF), oral spray vs placebo

Interruptions to cancer treatment (radiotherapy breaks longer than two days) · Adults with cancer receiving treatment

Epidermal growth factor (EGF), oral spray showed no clear difference in interruptions to cancer treatment (radiotherapy breaks longer than… compared with placebo; GRADE not reported.

1 finding from 1 review

Periodontal treatment (scaling and root planing, alone or with antimicrobials) vs Alternative (less intensive) periodontal treatment, alone or with placebo

Small‐for‐gestational age · Pregnant women considered to have periodontal disease (gingivitis or periodontitis) after dental examination

The review found no eligible studies for this question.

1 finding from 1 review

Amifostine vs no treatment/placebo

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

Antimicrobial lozenge vs placebo

Side effects (other: dryness in mouth, diarrhoea, constipation) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
1 finding from 1 review

Pilocarpine vs no treatment/placebo

Speech difficulties (VAS 0-100 mm) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Pilocarpine led to higher speech difficulties (VAS 0-100 mm) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

G‐CSF vs placebo or no treatment

Normalcy of diet (percutaneous endoscopic gastrostomy) · Adults with cancer receiving treatment

Granulocyte-colony stimulating factor (G-CSF) showed no clear difference in normalcy of diet (percutaneous endoscopic gastrostomy) compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Salivary flow rate · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine led to higher salivary flow rate (incidence of > 0.1 g saliva/5 min, unstimulated) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Keratinocyte growth factor (KGF; palifermin or repifermin), intravenous vs placebo

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

Keratinocyte growth factor (KGF; palifermin or repifermin),… showed no clear difference in normalcy of diet (total parenteral nutrition) compared with placebo; GRADE not reported.

1 finding from 1 review

Fluoride supplementation (tablets, drops, lozenges or chewing gum) vs placebo or no treatment

Decayed or filled primary tooth surfaces at 3 years · Pregnant women (for preventing dental caries in the primary teeth of their children)

It is very uncertain whether fluoride supplementation (tablets, drops, lozenges or chewing gum) changes decayed or filled primary tooth surfaces at 3 years compared with placebo or no treatment (very low certainty).

1 finding from 1 review

GM-CSF vs placebo or no treatment

Normalcy of diet (tube feeding) · Adults with cancer receiving treatment

Granulocyte-macrophage colony-stimulating factor (GM-CSF) showed no clear difference in normalcy of diet (tube feeding) compared with placebo or no treatment; GRADE not reported.

1 finding from 1 review

Erythropoietin mouthwash vs placebo

Number of days in hospital · Adults receiving bone marrow/stem cell transplantation after conditioning therapy for haematological cancers

Erythropoietin mouthwash showed no clear difference in number of days in hospital compared with placebo; GRADE not reported.

1 finding from 1 review

Keratinocyte growth factor (KGF; palifermin or repifermin), intravenous vs placebo

Number of days of treatment with opioid analgesics · Adults with cancer receiving treatment

Keratinocyte growth factor (KGF; palifermin or repifermin),… showed no clear difference in number of days of treatment with opioid analgesics compared with placebo; GRADE not reported.

1 finding from 1 review

Zinc vs placebo

Adverse events · 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 adverse events compared with placebo (very low certainty).

1 finding from 1 review

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

Fluoride supplementation (tablets, drops, lozenges or chewing gum) vs placebo or no treatment

Decayed or filled primary tooth surfaces at 5 years · Pregnant women (for preventing dental caries in the primary teeth of their children)

It is very uncertain whether fluoride supplementation (tablets, drops, lozenges or chewing gum) changes decayed or filled primary tooth surfaces at 5 years compared with placebo or no treatment (very low certainty).

1 finding from 1 review