Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,345 questions · 4,525 findings · 483 reviews

No studies found 1,024 · 22.6%GRADE not reported 388 · 8.6%Very low 1,172 · 25.9%Low 1,227 · 27.1%Moderate 576 · 12.7%High 138 · 3%

Cataract surgery with Hydrus microstent vs cataract surgery alone

Proportion of participants who required further glaucoma surgery, including laser · people with cataracts and open angle glaucoma, many of whom had mild or moderate glaucoma, which was well‐controlled with medication

Cataract surgery with Hydrus microstent may leads to lower proportion of participants who required further glaucoma surgery,… compared with cataract surgery alone (low certainty).

1 finding from 1 review

Prophylactic platelet transfusion prior to surgery vs no prophylactic platelet transfusion prior to surgery

All‐cause mortality within 30 days of surgery · people with a low platelet count

It is very uncertain whether prophylactic platelet transfusion prior to surgery changes all‐cause mortality within 30 days of surgery compared with no prophylactic platelet transfusion prior to surgery (very low certainty).

1 finding from 1 review

Prophylactic platelet transfusion prior to surgery vs no prophylactic platelet transfusion prior to surgery

Number of participants with major bleeding within 7 days of surgery (surgical site bleeding requiring a second intervention or reoperation or surgical site bleeding that causes a haematoma or haemarthrosis of sufficient size to delay mobilisation ... · people with a low platelet count

It is very uncertain whether prophylactic platelet transfusion prior to surgery changes number of participants with major bleeding within 7 days of surgery… compared with no prophylactic platelet transfusion prior to surgery (very low certainty).

1 finding from 1 review

Prophylactic platelet transfusion prior to surgery vs no prophylactic platelet transfusion prior to surgery

Number of participants with minor procedure‐related bleeding within 7 days of surgery · people with a low platelet count

It is very uncertain whether prophylactic platelet transfusion prior to surgery changes the number of participants with minor procedure‐related bleeding… compared with no prophylactic platelet transfusion prior to surgery (very low certainty).

1 finding from 1 review

Radiosurgery alone vs WBRT and radiosurgery

1‐Year radiosurgery‐targeted lesion controlNo. of participants: 602(4 RCTs) · patients with newly diagnosed multiple brain metastases

Radiosurgery alone leads to higher 1‐Year radiosurgery‐targeted lesion controlNo. of participants:… compared with WBRT and radiosurgery (high certainty).

1 finding from 1 review

Neoadjuvant chemotherapy prior to interval surgery (NACT) vs surgery followed by chemotherapy (PDS)

Surgically‐related severe adverse effects (grade 3+) ‐ stoma formation (within 30 days of surgery) · women with advanced ovarian epithelial cancer

Neoadjuvant chemotherapy prior to interval surgery (NACT) probably leads to lower surgically‐related severe adverse effects (grade 3+) ‐ stoma… compared with surgery followed by chemotherapy (PDS) (moderate certainty).

1 finding from 1 review

Neoadjuvant chemotherapy prior to interval surgery (NACT) vs surgery followed by chemotherapy (PDS)

Surgically‐related severe adverse effects (grade 3+) ‐ bowel resection (within 30 days of surgery) · women with advanced ovarian epithelial cancer

Neoadjuvant chemotherapy prior to interval surgery (NACT) probably leads to lower surgically‐related severe adverse effects (grade 3+) ‐ bowel… compared with surgery followed by chemotherapy (PDS) (moderate certainty).

1 finding from 1 review

Neoadjuvant chemotherapy prior to interval surgery (NACT) vs surgery followed by chemotherapy (PDS)

Surgically‐related severe adverse effects (grade 3+) ‐ postoperative G3+ events (within 30 days of surgery) · women with advanced ovarian epithelial cancer

Neoadjuvant chemotherapy prior to interval surgery (NACT) probably leads to lower surgically‐related severe adverse effects (grade 3+) ‐ postoperative… compared with surgery followed by chemotherapy (PDS) (moderate certainty).

1 finding from 1 review

Neoadjuvant chemotherapy prior to interval surgery (NACT) vs surgery followed by chemotherapy (PDS)

Surgically‐related postoperative mortality (28 days to 6 months of surgery4) · women with advanced ovarian epithelial cancer

Neoadjuvant chemotherapy prior to interval surgery (NACT) leads to lower surgically‐related postoperative mortality (28 days to 6 months of… compared with surgery followed by chemotherapy (PDS) (high certainty).

1 finding from 1 review

Pelvic floor muscle training before and after prolapse surgery vs no training

Repeat surgery (or pessary) for recurrent prolapse · women undergoing pelvic organ prolapse surgery

Pelvic floor muscle training before and after prolapse surgery showed no clear difference in repeat surgery (or pessary) for recurrent prolapse compared with no training (low certainty).

1 finding from 1 review

Prophylactic plasma transfusion before surgery/invasive procedures vs alternative haemostatic agents

Serious adverse events measured by surgery or procedure‐related complications within 30 days ‐ not reported · patients undergoing non‐cardiac surgery/invasive procedures

The review found no eligible studies for this question.

1 finding from 1 review

Combined surgery vs phacoemulsification alone

Proportion using one or more medications at one year after surgery Number of participants · patients with eyes with cataract and glaucoma

Combined surgery may leads to lower proportion using one or more medications at one year after surgery… compared with phacoemulsification alone (low certainty).

1 finding from 1 review