Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 12 findings · 3 reviews · Oral Health

No studies found 0 · 0%GRADE not reported 9 · 75%Very low 2 · 16.7%Low 0 · 0%Moderate 1 · 8.3%High 0 · 0%

Amifostine 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 amifostine changes salivary flow rate (mg/5 min, unstimulated) compared with no treatment/placebo (very low certainty).

2 findings 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

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

Daily chewing gum for 2 weeks or longer vs No gum chewing or control

Salivary flow rate (unstimulated) · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

codex

1 finding from 1 review

Gum chewing (sugar-free) vs No chewing gum

Salivary flow rate (unstimulated) · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

In elderly and medically compromised people with xerostomia, chewing sugar-free gum daily for two or more weeks produces a small but statistically significant increase in unstimulated whole salivary flow rate versus no gum (SMD 0.44, 95% CI 0.22 to 0.66); certainty of evidence was not formally graded.

1 finding 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

Bethanechol vs placebo

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 placebo; GRADE not reported.

1 finding from 1 review

Anorexia nervosa (as exposure; diagnosed by DSM-III/III-R/IV/V) vs Healthy controls

Salivary flow rate (unstimulated) · Patients with anorexia nervosa aged >=12 years (mean age ~18.4; entirely female in reported data), general community-dwelling population

Anorexia nervosa probably reduces unstimulated salivary flow rate versus healthy controls (MD -0.27 ml/min, 95% CI -0.31 to -0.24; moderate certainty).

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

Gum chewing (sugar-free) vs No chewing gum

Salivary flow rate · Elderly (>60 years) and medically compromised adults with xerostomia / dry mouth

Across 19 studies the effect of gum chewing on stimulated and/or unstimulated salivary flow rate was mixed (9 positive, 10 no effect); this broad outcome was not meta-analyzed.

1 finding from 1 review