Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

268 questions · 274 findings · 96 reviews

No studies found 24 · 8.8%GRADE not reported 11 · 4%Very low 27 · 9.9%Low 66 · 24.1%Moderate 96 · 35%High 50 · 18.2%

Summary of findings table (subcomparison 5): chemotherapy or targeted therapy agent(s) plus control intervention vs control intervention

Overall survival · palliative participants with esophageal and GE‐junction carcinoma

Summary of findings table: chemotherapy or targeted therapy agent(s)… leads to lower overall survival compared with control intervention alone (high certainty).

1 finding from 1 review

Summary of findings table (subcomparison 1): chemotherapy or targeted therapy plus best supportive care (BSC) vs BSC

Overall survival · palliative participants with esophageal and GE‐junction carcinoma

Summary of findings table (subcomparison 1): chemotherapy or… leads to lower overall survival compared with BSC (high certainty).

1 finding from 1 review

Summary of findings table (subcomparison 5): chemotherapy or targeted therapy agent(s) plus control intervention vs control intervention

Overall survival · palliative participants with AC of the esophagus

Summary of findings table (subcomparison 5): chemotherapy or… leads to lower overall survival compared with control intervention alone (high certainty).

1 finding from 1 review

Summary of findings table (subcomparison 5): chemotherapy or targeted therapy agent(s) plus control intervention vs control intervention

Overall survival · palliative participants with SCC of the esophagus

Summary of findings table (subcomparison 6): chemotherapy or… leads to lower overall survival compared with control intervention alone (high certainty).

1 finding from 1 review

Anti‐leukaemic therapy plus alemtuzumab vs anti‐leukaemic therapy alone (anti‐leukaemic therapy identical

Overall survival: Median length of · people with chronic lymphocytic leukaemia

Anti‐leukaemic therapy plus alemtuzumab probably leads to lower overall survival (median 2 years) compared with anti‐leukaemic therapy alone (anti‐leukaemic therapy identical (moderate certainty).

1 finding from 1 review

Induction chemotherapy plus locoregional treatment (radiotherapy and/or surgery) vs Locoregional treatment (radiotherapy and/or surgery) alone

Overall survival, induction platinum + 5-fluorouracil prior to surgery vs surgery alone · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Induction chemotherapy plus locoregional treatment (radiotherapy… showed no clear difference in overall survival, induction platinum + 5-fluorouracil prior to… compared with locoregional treatment (radiotherapy and/or surgery) alone (low certainty).

1 finding from 1 review

Induction chemotherapy plus locoregional treatment (radiotherapy and/or surgery) vs Locoregional treatment (radiotherapy and/or surgery) alone

Overall survival, induction cisplatin + 5-fluorouracil prior to concurrent chemoradiation (cisplatin) vs concurrent chemoradiation (cisplatin) · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Induction chemotherapy plus locoregional treatment (radiotherapy… showed no clear difference in overall survival, induction cisplatin + 5-fluorouracil prior to… compared with locoregional treatment (radiotherapy and/or surgery) alone (low certainty).

1 finding from 1 review

Induction chemotherapy plus locoregional treatment (radiotherapy and/or surgery) vs Locoregional treatment (radiotherapy and/or surgery) alone

Overall survival, induction cisplatin + 5-fluorouracil + docetaxel prior to concurrent chemoradiation (cisplatin) vs concurrent chemoradiation (cisplatin) · People receiving curative-intent treatment for oral cavity and oropharyngeal (squamous cell) cancer

Induction chemotherapy plus locoregional treatment (radiotherapy… showed no clear difference in overall survival, induction cisplatin + 5-fluorouracil + docetaxel… compared with locoregional treatment (radiotherapy and/or surgery) alone (low certainty).

1 finding from 1 review

Summary of findings table ‐ Postmastectomy radiotherapy (PMRT) vs no PMRT

Overall survival (OS) · women with breast cancer and one to three positive lymph nodes

Summary of findings table ‐ Postmastectomy radiotherapy (PMRT) probably leads to lower overall survival (OS) compared with no PMRT (moderate certainty).

1 finding from 1 review

Hypofractionated radiotherapy vs daily conventionally fractionated radiotherapy

Overall survival for subgroup age 60 years and older glioblastoma · high‐grade glioma

Hypofractionated radiotherapy showed no clear difference in overall survival for subgroup aged ≥ 60 years glioblastoma compared with daily conventionally fractionated radiotherapy (high certainty).

1 finding from 1 review

Perioperative chemotherapy vs primary surgery

Overall survival among all patients · resectable adenocarcinoma of the stomach, gastroesophageal junction, and lower esophagus

Perioperative chemotherapy leads to lower overall survival among all patients compared with primary surgery (high certainty).

1 finding from 1 review

Perioperative chemotherapy vs primary surgery

Overall survival by tumor site ‐ Stomach · resectable adenocarcinoma of the stomach, gastroesophageal junction, and lower esophagus

Perioperative chemotherapy showed no clear difference in overall survival by tumor site ‐ Stomach compared with primary surgery (high certainty).

1 finding from 1 review

Perioperative chemotherapy vs primary surgery

Overall survival by tumor site ‐ Esophagus · resectable adenocarcinoma of the stomach, gastroesophageal junction, and lower esophagus

Perioperative chemotherapy showed no clear difference in overall survival by tumor site ‐ Esophagus compared with primary surgery (high certainty).

1 finding from 1 review

Perioperative chemotherapy vs primary surgery

Overall survival by tumor site ‐ GE junction · resectable adenocarcinoma of the stomach, gastroesophageal junction, and lower esophagus

Perioperative chemotherapy leads to lower overall survival by tumor site ‐ GE junction compared with primary surgery (high certainty).

1 finding from 1 review