Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,125 questions · 1,173 findings · 91 reviews · Headline outcomes only

No studies found 192 · 16.4%GRADE not reported 47 · 4%Very low 199 · 17%Low 325 · 27.7%Moderate 271 · 23.1%High 139 · 11.8%

Combination chemotherapy vs single‐agent chemotherapy

Chemotherapy compliance · people with resectable stage II and III rectal cancer undergoing preoperative chemoradiation followed by surgery

Combination chemotherapy leads to lower chemotherapy compliance compared with single‐agent chemotherapy (high certainty).

1 finding from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Menstruation recovery or maintenance: · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

GnRH agonist plus chemotherapy may leads to higher menstruation recovery or maintenance: compared with chemotherapy alone (low certainty).

2 findings from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Premature ovarian failure · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

GnRH agonist plus chemotherapy probably leads to lower premature ovarian failure compared with chemotherapy alone (moderate certainty).

1 finding from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Pregnancy · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

GnRH agonist plus chemotherapy showed no clear difference in pregnancy compared with chemotherapy alone (low certainty).

1 finding from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Ovulation · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

GnRH agonist plus chemotherapy may leads to higher ovulation compared with chemotherapy alone (low certainty).

1 finding from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Adverse effects: hot flush · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

It is very uncertain whether gnRH agonist plus chemotherapy changes adverse effects: hot flush compared with chemotherapy alone (very low certainty).

1 finding from 1 review

GnRH agonist plus chemotherapy vs chemotherapy alone

Adverse effects: vaginal dryness · premenopausal women with malignant conditions, receiving GnRH agonist before or in parallel to chemotherapy

GnRH agonist plus chemotherapy showed no clear difference in adverse effects: vaginal dryness compared with chemotherapy alone (moderate certainty).

1 finding from 1 review

Chemotherapy vs chemotherapy alone

Overall survival (taxane‐containing doublet therapy vs taxane monotherapy) · advanced gastric adenocarcinoma

Chemotherapy showed no clear difference in overall survival (taxane‐containing doublet therapy vs taxane… compared with chemotherapy (low certainty).

1 finding from 1 review

Chemotherapy vs chemotherapy alone

Progression‐free survival (PSF) · advanced gastric adenocarcinoma

Chemotherapy showed no clear difference in progression‐free survival (non‐taxane monotherapy vs taxane… compared with chemotherapy (low certainty).

3 findings from 1 review

Chemotherapy vs chemotherapy alone

Tumour response · advanced gastric adenocarcinoma

Chemotherapy showed no clear difference in tumour response rate (non‐taxane monotherapy vs taxane monotherapy) compared with chemotherapy (low certainty).

2 findings from 1 review

Chemotherapy vs chemotherapy alone

Tumour response rate (taxane‐containing doublet therapy vs taxane monotherapy) · advanced gastric adenocarcinoma

It is very uncertain whether chemotherapy changes tumour response rate (taxane‐containing doublet therapy vs taxane… compared with chemotherapy (very low certainty).

1 finding from 1 review