Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,476 questions · 1,535 findings · 101 reviews

No studies found 233 · 15.2%GRADE not reported 332 · 21.6%Very low 209 · 13.6%Low 343 · 22.3%Moderate 279 · 18.2%High 139 · 9.1%

Gefitinib vs chemotherapy alone

Overall survival (OS) · People with advanced non‐small cell lung cancer

Gefitinib showed no clear difference in overall survival (OS) compared with chemotherapy (moderate certainty).

2 findings from 1 review

Gefitinib vs chemotherapy alone

Progression‐free survival · People with advanced non‐small cell lung cancer

Gefitinib showed no clear difference in progression‐free survival (PFS) compared with chemotherapy (moderate certainty).

2 findings from 1 review

EGFR tyrosine kinase inhibitor (TKI) vs observation

Progression‐free survival · maintenance treatment of epithelial ovarian cancer after first‐line chemotherapy

It is very uncertain whether EGFR tyrosine kinase inhibitor (TKI) changes progression‐free survival compared with observation alone (very low certainty).

1 finding from 1 review