Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,085 questions · 1,232 findings · 66 reviews · All outcomes

No studies found 218 · 17.7%GRADE not reported 745 · 60.5%Very low 179 · 14.5%Low 65 · 5.3%Moderate 25 · 2%High 0 · 0%

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

Overall survival · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Palifermin showed no clear difference in overall survival compared with placebo (moderate certainty).

1 finding from 1 review

Pilocarpine vs no treatment/placebo

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

It is very uncertain whether pilocarpine changes salivary flow rate (unstimulated) compared with no treatment/placebo (very low certainty).

1 finding from 1 review

Amifostine 200 mg/m2 three times weekly vs Amifostine 200 mg/m2 five times weekly

Survival (overall survival and locoregional control) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
1 finding from 1 review

Amifostine (intravenous) vs Amifostine (subcutaneous)

Locoregional control · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine (intravenous) showed no clear difference in locoregional tumour control compared with amifostine (subcutaneous); GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Cost (mean per-patient supportive care costs) · 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

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

Pilocarpine led to lower xerostomia (objective, LENT-SOMA scale) compared with no treatment/placebo; GRADE not reported.

3 findings from 1 review

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

The review found no eligible studies for this question.

1 finding from 1 review

Amifostine vs no treatment/placebo

Adverse effects (other reported events) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
1 finding from 1 review

Amifostine vs no treatment/placebo

Xerostomia (grade >= 2, 0-4 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine may leads to lower xerostomia (grade >= 2, 0-4 scale) compared with no treatment/placebo (low certainty).

3 findings from 1 review

Polaprezinc vs Azulene oral rinse

Taste disturbance (severe, > 2 on 0-3 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Polaprezinc led to lower taste disturbance (severe, > 2 on 0-3 scale) compared with azulene oral rinse; GRADE not reported.

1 finding from 1 review

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

Adverse effects · 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

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

Antimicrobial lozenge showed no clear difference in xerostomia compared with placebo; GRADE not reported.

1 finding from 1 review