Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,061 questions · 2,151 findings · 116 reviews

No studies found 609 · 28.3%GRADE not reported 268 · 12.5%Very low 635 · 29.5%Low 491 · 22.8%Moderate 122 · 5.7%High 26 · 1.2%

Ibuprofen taken pre-emptively (about 1 hour before treatment) vs Ibuprofen taken post-treatment

Rescue analgesia · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Ibuprofen taken pre-emptively (about 1 hour before treatment) showed no clear difference in rescue analgesia compared with ibuprofen taken post-treatment; GRADE not reported.

1 finding from 1 review

Bethanechol vs Artificial saliva

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

Bethanechol showed no clear difference in xerostomia (dry mouth, yes/no) compared with artificial saliva; GRADE not reported.

2 findings from 1 review

Analgesic (any: NSAID, paracetamol, local anaesthetic or opioid) vs placebo or control

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · People undergoing orthodontic treatment (any age; 9 to 34 years in included studies)

Analgesic (any: NSAID, paracetamol, local anaesthetic or opioid) probably leads to lower pain intensity (VAS 0-100 mm) compared with control (placebo or no treatment) (moderate certainty).

3 findings from 1 review

Bethanechol vs Artificial saliva

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

Bethanechol led to higher salivary flow rate (unstimulated, ml/min) compared with artificial saliva; GRADE not reported.

2 findings from 1 review

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

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

Palifermin showed no clear difference in progression-free survival compared with placebo; GRADE not reported.

1 finding from 1 review

Bethanechol vs Artificial saliva

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

Bethanechol showed no clear difference in overall survival compared with artificial saliva; GRADE not reported.

1 finding from 1 review

Amifostine vs no treatment/placebo

Dysphagia (grade >= 3, 0-4 scale) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Amifostine showed no clear difference in dysphagia (grade >= 3, 0-4 scale) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

Chinese medicine 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

Chinese medicine led to higher salivary flow rate (stimulated) compared with no treatment/placebo; GRADE not reported.

1 finding from 1 review

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

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

Palifermin showed no clear difference in xerostomia (grade >= 2, 0-4 scale) compared with placebo (low certainty).

1 finding from 1 review