Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

73 questions · 73 findings · 22 reviews · Headline outcomes only

No studies found 5 · 6.8%GRADE not reported 4 · 5.5%Very low 12 · 16.4%Low 20 · 27.4%Moderate 19 · 26%High 13 · 17.8%

Retinoic acid post‐consolidation therapy vs no further treatment

Overall survival (reported as mortality) · high‐risk neuroblastoma patients treated with autologous HSCT

Retinoic acid postconsolidation therapy showed no clear difference in overall survival (reported as mortality) compared with no further treatment (low certainty).

1 finding from 1 review

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

Overall survival · advanced gastric and oesophago‐gastric junction adenocarcinoma

Chemotherapy probably leads to lower overall survival compared with placebo, best supportive care (BSC) or no treatment (moderate certainty).

1 finding from 1 review

Chemmotherapy combined with biological therapy vs chemotherapy alone

Overall survival · advanced gastric and oesophago‐gastric junction adenocarcinoma

Chemmotherapy combined with biological therapy showed no clear difference in overall survival compared with chemotherapy (moderate certainty).

1 finding from 1 review