What do systematic reviews say?

Iron therapy vs No treatment, placebo, usual care, or another oral care measure

• Iron therapy for preoperative anaemia 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 72 participants
  Very low

Postoperative use of LNG‐IUD vs postoperative GnRH‐a

The review found no eligible studies for this question.

• Levonorgestrel‐releasing intrauterine device (LNG‐IUD) for symptomatic endometriosis following surgery 2021 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intraoperative neuromonitoring vs visual nerve identification only during thyroidectomy

The review found no eligible studies for this question.

• Intraoperative neuromonitoring versus visual nerve identification for prevention of recurrent laryngeal nerve injury… 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

IStent (or iStent inject) vs medical therapy

The review found no eligible studies for this question.

• Ab interno trabecular bypass surgery with iStent for open‐angle glaucoma 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

IStent in combination with phacoemulsification vs phacoemulsification alone

The review found no eligible studies for this question.

• Ab interno trabecular bypass surgery with iStent for open‐angle glaucoma 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with ligament reconstruction and tendon interposition (T and LRTI) vs trapeziectomy and ligament reconstruction (T and LR)

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with ligament reconstruction and tendon interposition (T and LRTI) vs trapeziectomy and interpositional arthroplasty (T and IA)

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with interpositional arthroplasty (T and IA) vs Artelon joint resurfacing

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with ligament reconstruction and tendon interposition (T and LRTI) vs trapeziectomy (T)

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with interpositional arthroplasty (T and IA) vs trapeziometacarpal joint replacement (Swanson)

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Trapeziectomy with interpositional arthroplasty (T and IA) vs trapeziectomy (T)

The review found no eligible studies for this question.

• Surgery for thumb (trapeziometacarpal joint) osteoarthritis 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Total thyroidectomy vs subtotal thyroidectomy

The review found no eligible studies for this question.

• Thyroid surgery for Graves’ disease and Graves’ ophthalmopathy 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found
• Thyroid surgery for Graves’ disease and Graves’ ophthalmopathy 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Bilateral subtotal thyroidectomy vs the Dunhill procedure

The review found no eligible studies for this question.

• Thyroid surgery for Graves’ disease and Graves’ ophthalmopathy 2015 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laparoscopic gastric bypass vs laparoscopic sleeve gastrectomy

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 217 participants
  Very low

Gastric bypass vs biliopancreatic diversion with duodenal switch (laparoscopic or open)

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 60 participants
  Very low

Laparoscopic gastric bypass vs laparoscopic duodenojejunal bypass with sleeve gastrectomy

The review found no eligible studies for this question.

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laparoscopic adjustable gastric banding vs laparoscopic sleeve gastrectomy

The review found no eligible studies for this question.

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laparaoscopic gastric imbrication vs laparoscopic sleeve gastrectomy

The review found no eligible studies for this question.

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Intervention not reported

• Surgery or radiosurgery plus whole brain radiotherapy versus surgery or radiosurgery alone for brain metastases 2014 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 436 participants
  Low

Zinc oxide mesh vs placebo mesh

The review found no eligible studies for this question.

• Dressings and topical agents for the management of open wounds after surgical treatment for sacrococcygeal pilonidal… 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found