What do systematic reviews say?

Aggressive vs conservative blood transfusion

The review found no eligible studies for this question.

• Preoperative blood transfusions for sickle cell disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Green tea extract supplementation vs placebo

The review found no eligible studies for this question.

• Green tea (Camellia sinensis) for the prevention of cancer 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laxative plus bulking agent vs laxative alone

The review found no eligible studies for this question.

• Interventions for preventing postpartum constipation 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laxative vs placebo

The review found no eligible studies for this question.

• Interventions for preventing postpartum constipation 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Initiation of prophylactic therapy guided by colonoscopy vs initiation of prophylactic therapy immediately after surgery

The review found no eligible studies for this question.

• Colonoscopy‐guided therapy for the prevention of post‐operative recurrence of Crohn’s disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intensification of prophylactic therapy guided by colonoscopy vs intensification guided by clinical recurrence

The review found no eligible studies for this question.

• Colonoscopy‐guided therapy for the prevention of post‐operative recurrence of Crohn’s disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

OFS vs no OFS

• Ovarian suppression for adjuvant treatment of hormone receptor‐positive early breast cancer 2020 · Cochrane Headline outcomes only
  no estimate extracted
  5 studies · 2996 participants
  Low

Bi‐PAP vs fixed CPAP

• Pressure modification or humidification for improving usage of continuous positive airway pressure machines in adults… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 151 participants
  Low

Heated humidification + fixed CPAP vs fixed CPAP

The review found no eligible studies for this question.

• Pressure modification or humidification for improving usage of continuous positive airway pressure machines in adults… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Auto‐CPAP vs fixed CPAP

• Pressure modification or humidification for improving usage of continuous positive airway pressure machines in adults… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 352 participants
  Low

Sodium thiosulfate vs no otoprotective intervention

The review found no eligible studies for this question.

• Medical interventions for the prevention of platinum‐induced hearing loss in children with cancer 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Amifostine vs no otoprotective intervention

The review found no eligible studies for this question.

• Medical interventions for the prevention of platinum‐induced hearing loss in children with cancer 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Agomelatine vs placebo

The review found no eligible studies for this question.

• Melatonin and agomelatine for preventing seasonal affective disorder 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: cycled vs culture‐based antibiotic therapy

The review found no eligible studies for this question.

• Treatments for preventing recurrence of infection with Pseudomonas aeruginosa in people with cystic fibrosis 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Exercise vs control immediately post intervention

The review found no eligible studies for this question.

• Interventions for preventing falls in people with multiple sclerosis 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Pharmacy‐based management (pharmacist with or without wider team) vs treatment

• Pharmacy‐based management for depression in adults 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 239 participants
  GRADE not reported

Acupuncture vs sham

• Acupuncture and acupressure for premenstrual syndrome 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 67 participants
  Low

Probiotics vs placebo

• Probiotics for the prevention or treatment of chemotherapy‐ or radiotherapy‐related diarrhoea in people with cancer 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 72 participants
  Low

Surgical portosystemic shunts vs devascularisation with splenectomy

• Surgical portosystemic shunts versus devascularisation procedures for prevention of variceal rebleeding in people with… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 154 participants
  GRADE not reported

B vitamins vs placebo

• Vitamin and mineral supplementation for preventing dementia or delaying cognitive decline in people with mild… 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 138 participants
  Moderate