Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

351 questions · 368 findings · 41 reviews · Headline outcomes only

No studies found 47 · 12.8%GRADE not reported 16 · 4.3%Very low 68 · 18.5%Low 92 · 25%Moderate 97 · 26.4%High 48 · 13%

Combination chemotherapy vs single‐agent chemotherapy

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

Combination chemotherapy probably leads to lower radiotherapy compliance compared with single‐agent chemotherapy (moderate certainty).

1 finding from 1 review

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

Combination therapy vs alpha‐blocker

Surgical intervention · men with lower urinary tract symptoms secondary to benign prostatic obstruction

It is very uncertain whether combination therapy changes surgical intervention compared with alpha‐blockers (very low certainty).

1 finding from 1 review