Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,410 questions · 8,901 findings · 1,091 reviews

No studies found 1,687 · 19%GRADE not reported 1,469 · 16.5%Very low 1,969 · 22.1%Low 2,060 · 23.1%Moderate 1,302 · 14.6%High 414 · 4.7%

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Full-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Stability: Little's Irregularity Index (lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether full-time clear plastic (removable) retainer changes stability: Little's Irregularity Index (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

Fibre-reinforced composite fixed (bonded) retainer vs Multistrand / spiral wire fixed (bonded) retainer

Adverse effects on oral health: Gingival Index (lower arch) · People who had received fixed appliance orthodontic treatment

The review found no eligible studies for this question.

1 finding from 1 review

Full-time clear plastic (removable) retainer vs Any type of fixed (bonded) retainer

Adverse effects on oral health: caries (lower arch) · People who had received fixed appliance orthodontic treatment

It is very uncertain whether full-time clear plastic (removable) retainer changes adverse effects on oral health: caries (lower arch) compared with any type of fixed (bonded) retainer (very low certainty).

1 finding from 1 review

CBT vs alternative treatment

Mental distress · People aged 12 years and over with painful TMD lasting 3 months or longer

Cognitive behavioural therapy (CBT) may leads to lower psychological distress at follow-up compared with alternative (active) treatment (e.g. oral splint, medication,… (low certainty).

1 finding from 1 review

CBT vs inactive control (usual care care, attention control, waitlist)

Reduction in pain intensity · People aged 12 years and over with painful TMD lasting 3 months or longer

Cognitive behavioural therapy (CBT) may leads to lower pain intensity at follow-up (12 months) compared with usual care, waiting list or no treatment (control) (low certainty).

1 finding from 1 review

CBT vs alternative treatment

Disability caused by pain at follow-up · People aged 12 years and over with painful TMD lasting 3 months or longer

Cognitive behavioural therapy (CBT) showed no clear difference in disability caused by pain at follow-up compared with alternative (active) treatment (e.g. oral splint, medication,… (low certainty).

1 finding from 1 review

Any glucocorticoid vs no glucocorticoids or placebo

Clinical pregnancy rate · assisted reproduction technology cycles

It is very uncertain whether glucocorticoids changes clinical pregnancy rate per couple: dosage and timing of… compared with no glucocorticoids or placebo (very low certainty).

1 finding from 1 review

Interventions (vitamin B1, mefenamic acid, tranexamic acid) vs placebo or active comparators (desmopressin, sodium diclofenac, flavonoids)

Side effects: gastrointestinal disturbances (diarrhoea, lower abdominal pain), headache and sweating

It is very uncertain whether interventions (vitamin B1, mefenamic acid, tranexamic acid) changes side effects: gastrointestinal disturbances (diarrhoea, lower… compared with placebo or active comparators (desmopressin, sodium diclofenac,… (very low certainty).

1 finding from 1 review

Intratympanic corticosteroids vs systemic corticosteroids

Change in hearing threshold determined by PTA Range 0 dB to 140 dB Negative values represent lowering and positive values represent raising of the hearing threshold. A lower hearing threshold represents hearing improvement. Â · sudden sensorineural hearing loss

Intratympanic corticosteroids showed no clear difference in change in hearing threshold determined by PTA Range 0 dB to 140 dB… compared with systemic corticosteroids (low certainty).

1 finding from 1 review

Intratympanic plus systemic corticosteroids (combined therapy) vs systemic corticosteroids alone

Change in hearing threshold determined by PTA Range 0 dB to 140 dB Negative values represent lowering and positive values represent raising of the hearing threshold. A lower hearing threshold represents hearing improvement. Â · sudden sensorineural hearing loss

Intratympanic plus systemic corticosteroids (combined therapy) showed no clear difference in change in hearing threshold determined by PTA Range 0 dB to 140 dB… compared with systemic corticosteroids alone (low certainty).

1 finding from 1 review

Intratympanic plus systemic corticosteroids (combined therapy) vs systemic corticosteroids alone

Final hearing threshold determined by PTA (a lower value represents better hearing) · sudden sensorineural hearing loss

It is very uncertain whether intratympanic plus systemic corticosteroids (combined therapy) changes final hearing threshold determined by PTA A lower value represents… compared with systemic corticosteroids alone (very low certainty).

1 finding from 1 review

Intratympanic corticosteroids vs no treatment or versus placebo

Change in hearing threshold determined by PTA Range 0 dB to 140 dB Negative values represent lowering and positive values represent raising of the hearing threshold. A lower hearing threshold represents hearing improvement. Â · sudden sensorineural hearing loss

Intratympanic corticosteroids showed no clear difference in change in hearing threshold determined by PTA Range 0 dB to 140 dB… compared with no treatment or versus placebo (low certainty).

1 finding from 1 review

Intratympanic corticosteroids vs no treatment or versus placebo

Final hearing threshold determined by PTA (a lower value represents better hearing) · sudden sensorineural hearing loss

Intratympanic corticosteroids showed no clear difference in final hearing threshold determined by PTA (a lower value represents… compared with no treatment or versus placebo (low certainty).

1 finding from 1 review

Intratympanic corticosteroids vs systemic corticosteroids

Final hearing threshold determined by PTA (a lower value represents better hearing) · sudden sensorineural hearing loss

Intratympanic corticosteroids showed no clear difference in final hearing threshold determined by PTA (a lower value represents… compared with systemic corticosteroids (low certainty).

1 finding from 1 review

Helium vs carbon dioxide

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

Helium showed no clear difference in pain scores (first postoperative day) Visual analogue scale, lower… compared with carbon dioxide (low certainty).

1 finding from 1 review

Room air vs carbon dioxide

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · people undergoing laparoscopic general abdominal or gynaecological pelvic surgery under general anaesthesia

It is very uncertain whether room air changes pain scores (first postoperative day) Visual analogue scale, lower… compared with carbon dioxide (very low certainty).

1 finding from 1 review