Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

401 questions · 403 findings · 75 reviews · Headline outcomes only

No studies found 79 · 19.6%GRADE not reported 18 · 4.5%Very low 91 · 22.6%Low 110 · 27.3%Moderate 79 · 19.6%High 26 · 6.5%

Provider‐ or system‐based interventions vs no intervention or another intervention

Posters in clinic displaying influenza vaccination rates to encourage doctors to compete plus postcards to participants compared to posters alone · people aged 60 years and older living in the community

Provider‐ or system‐based interventions showed no clear difference in posters in clinic displaying influenza vaccination rates to… compared with no intervention or another intervention (high certainty).

1 finding from 1 review

Salt bath + UVB vs UVB alone

Number of adverse events requiring discontinuation of treatment ‐ not reported · people with chronic plaque psoriasis

Salt bath + UVB showed no clear difference in treatment‐related adverse events requiring withdrawal (number of… compared with UVB alone (low certainty).

1 finding from 1 review

Combined surgery vs phacoemulsification alone

Proportion using one or more medications at one year after surgery Number of participants · patients with eyes with cataract and glaucoma

Combined surgery may leads to lower proportion using one or more medications at one year after surgery… compared with phacoemulsification alone (low certainty).

1 finding from 1 review

Combined surgery vs phacoemulsification alone

Need for additional surgery: proportion of participants who received additional surgery to control IOP at 1 year · patients with eyes with cataract and glaucoma

Combined surgery showed no clear difference in proportion who received re‐operation to control IOP within one year… compared with phacoemulsification alone (low certainty).

1 finding from 1 review

Combined surgery vs phacoemulsification alone

Proportion who received intervention for surgical complications within one year Number of participants · patients with eyes with cataract and glaucoma

Combined surgery showed no clear difference in proportion who received intervention for surgical complications… compared with phacoemulsification alone (low certainty).

1 finding from 1 review

Chemotherapy alone vs same chemotherapy plus radiotherapy

Secondary malignant neoplasms · Patients with untreated Hodgkin lymphoma (early and advanced stages)

Chemotherapy alone may leads to lower secondary malignant neoplasms compared with same chemotherapy plus radiotherapy (low certainty).

1 finding from 1 review

Chemotherapy alone vs same chemotherapy plus radiotherapy

Death · Patients with untreated Hodgkin lymphoma (early and advanced stages)

Chemotherapy alone showed no clear difference in death compared with same chemotherapy plus radiotherapy (moderate certainty).

1 finding from 1 review

Chemotherapy alone vs same chemotherapy plus radiotherapy

Progression/relapse · Patients with untreated Hodgkin lymphoma (early and advanced stages)

Chemotherapy alone showed no clear difference in progression/relapse compared with same chemotherapy plus radiotherapy (moderate certainty).

1 finding from 1 review

Continuous chest compression alone vs interrupted chest compression plus artificial ventilation

Survival to hospital discharge · Patients with non‐trauma related out‐of‐hospital cardiac arrest

Continuous chest compression alone leads to higher survival to hospital discharge compared with interrupted chest compression plus artificial ventilation (high certainty).

1 finding from 1 review

Continuous chest compression alone vs interrupted chest compression plus artificial ventilation

Survival to hospital admission · Patients with non‐trauma related out‐of‐hospital cardiac arrest

Continuous chest compression alone showed no clear difference in survival to hospital admission compared with interrupted chest compression plus artificial ventilation (moderate certainty).

1 finding from 1 review