What do systematic reviews say?

Intervention not reported

• Nutritional supplements for people being treated for active tuberculosis 2016 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 134 participants
  Low

Electrical stimulation (ES) once a week vs ES three times a week

• Electrical stimulation with non‐implanted electrodes for overactive bladder in adults 2016 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 35 participants
  Very low

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after submucosal instrumentation (SI) vs Submucosal instrumentation (SI) alone, or SI plus placebo/sham aPDT

The review found no eligible studies for this question.

• Adjunctive antimicrobial photodynamic therapy for treating periodontal and peri‐implant diseases 2024 · Cochrane All outcomes
  Only one study reported evidence for adjunctive aPDT in people with peri-implant disease (Al Rifaiy 2022). Data were only available for two outcomes (PPD and BOP), both reported only at three months. No studies…
  Studies not reported
  No studies found

Adjunctive antimicrobial photodynamic therapy (aPDT) applied after subgingival instrumentation (SI) vs Subgingival instrumentation (SI) alone (hand or power-driven, or both), or SI plus placebo/sham aPDT

The review found no eligible studies for this question.

• Adjunctive antimicrobial photodynamic therapy for treating periodontal and peri‐implant diseases 2024 · Cochrane All outcomes
  No studies reported data for this outcome.
  Studies not reported
  No studies found

Repetitive transcranial magnetic stimulation (rTMS) vs active control‐site rTMS

The review found no eligible studies for this question.

• Non‐pharmacological interventions for improving language and communication in people with primary progressive aphasia 2024 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Inulin and oligofructose 15 g vs inulin and oligofructose 7.5 g daily

The review found no eligible studies for this question.

• Prebiotics for induction and maintenance of remission in ulcerative colitis 2024 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Antioxidants (lycopene, curcumin, Oxitard) vs Placebo or no active treatment

The review found no eligible studies for this question.

• Interventions for managing oral submucous fibrosis 2024 · Cochrane All outcomes
  The trials did not measure quality of life.
  0 studies
  No studies found

Any‐treatment‐dose vitamin D (greater than 400 IU/day) vs supplemental‐dose vitamin D (less than 400 IU/day)

The review found no eligible studies for this question.

• Vitamin D for the treatment of inflammatory bowel disease 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

High‐treatment‐dose vitamin D (greater than 1000 IU/day) vs low‐treatment‐dose vitamin D (400 IU/day to 1000 IU/day)

• Vitamin D for the treatment of inflammatory bowel disease 2023 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 46 participants
  Very low

Anxiolytics vs inactive control

The review found no eligible studies for this question.

• Pharmacological treatment for central sleep apnoea in adults 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Methylxanthine derivatives vs inactive control

The review found no eligible studies for this question.

• Pharmacological treatment for central sleep apnoea in adults 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Hypnotics vs inactive control

The review found no eligible studies for this question.

• Pharmacological treatment for central sleep apnoea in adults 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Carbonic anhydrase inhibitors vs inactive control

The review found no eligible studies for this question.

• Pharmacological treatment for central sleep apnoea in adults 2023 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

CBT vs alternative treatment

The review found no eligible studies for this question.

• Psychological therapies for temporomandibular disorders (TMDs) 2022 · Cochrane All outcomes
  This outcome was not measured (not synthesised for this comparison; review-wide only one study reported quality of life).
  Studies not reported
  No studies found

Antidepressants vs placebo

• Adjuvant therapy with antidepressants for the management of inflammatory bowel disease 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 70 participants
  Low

Cannabis oil (5% cannabidiol sublingual oil) vs placebo oil

The review found no eligible studies for this question.

• Cannabis for the treatment of Crohn's disease 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Acupuncture vs other active therapy

The review found no eligible studies for this question.

• Acupuncture for neuropathic pain in adults 2017 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Chemical peeling vs combined chemical peeling plus any active intervention

The review found no eligible studies for this question.

• Interventions for acne scars 2016 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Parenteral iron vs inactive control

• Iron therapy in anaemic adults without chronic kidney disease 2014 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 1629 participants
  Very low

Oral iron vs inactive control

• Iron therapy in anaemic adults without chronic kidney disease 2014 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 276 participants
  Very low