Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

87 questions · 88 findings · 33 reviews · Headline outcomes only

No studies found 19 · 21.6%GRADE not reported 2 · 2.3%Very low 26 · 29.5%Low 25 · 28.4%Moderate 15 · 17%High 1 · 1.1%

Chemotherapy vs placebo, best supportive care (BSC) or no treatment

Any adverse events · advanced gastric and oesophago‐gastric junction adenocarcinoma

Chemotherapy showed no clear difference in any adverse events compared with placebo, best supportive care (BSC) or no treatment (high certainty).

1 finding from 1 review

Combination chemotherapy vs single‐agent chemotherapy

Toxicity ‐ early adverse events G3/4 · people with resectable stage II and III rectal cancer undergoing preoperative chemoradiation followed by surgery

Combination chemotherapy probably leads to higher toxicity ‐ early adverse events G3/4 compared with single‐agent chemotherapy (moderate certainty).

1 finding from 1 review

Chemotherapy vs placebo, best supportive care (BSC) or no treatment

Serious adverse events · advanced gastric and oesophago‐gastric junction adenocarcinoma

Chemotherapy probably leads to higher serious adverse events compared with placebo, best supportive care (BSC) or no treatment (moderate certainty).

1 finding from 1 review

Cediranib plus chemotherapy vs placebo plus chemotherapy

Serious adverse events · women with persistent, recurrent, or metastatic cervical cancer

Cediranib plus chemotherapy showed no clear difference in serious adverse events compared with placebo plus chemotherapy (low certainty).

1 finding from 1 review

Cediranib plus chemotherapy vs placebo plus chemotherapy

Specific adverse events: serious haemorrhage · women with persistent, recurrent, or metastatic cervical cancer

It is very uncertain whether cediranib plus chemotherapy changes specific adverse events: serious haemorrhage compared with placebo plus chemotherapy (very low certainty).

1 finding from 1 review

Cediranib plus chemotherapy vs placebo plus chemotherapy

Specific adverse events: serioushypertension · women with persistent, recurrent, or metastatic cervical cancer

It is very uncertain whether cediranib plus chemotherapy changes specific adverse events: serioushypertension compared with placebo plus chemotherapy (very low certainty).

1 finding from 1 review

Bevacizumab plus chemotherapy vs chemotherapy alone

Adverse events: hypertension · women with persistent, recurrent, or metastatic cervical cancer

Bevacizumab plus chemotherapy probably leads to higher specific adverse events: hypertension compared with chemotherapy (moderate certainty).

1 finding from 1 review

Cediranib plus chemotherapy vs placebo plus chemotherapy

Specific adverse events: serious thromboembolic events · women with persistent, recurrent, or metastatic cervical cancer

It is very uncertain whether cediranib plus chemotherapy changes specific adverse events: serious thromboembolic events compared with placebo plus chemotherapy (very low certainty).

1 finding from 1 review

Bevacizumab plus chemotherapy vs chemotherapy alone

Specific adverse events: serious haemorrhage · women with persistent, recurrent, or metastatic cervical cancer

Bevacizumab plus chemotherapy may leads to higher specific adverse events: serious haemorrhage compared with chemotherapy (low certainty).

1 finding from 1 review

Cediranib plus chemotherapy vs placebo plus chemotherapy

Specific adverse events: gastrointestinal perforations or fistulae · women with persistent, recurrent, or metastatic cervical cancer

It is very uncertain whether cediranib plus chemotherapy changes specific adverse events: gastrointestinal perforations or fistulae compared with placebo plus chemotherapy (very low certainty).

1 finding from 1 review