Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,411 questions · 2,571 findings · 265 reviews

No studies found 543 · 21.1%GRADE not reported 169 · 6.6%Very low 676 · 26.3%Low 731 · 28.4%Moderate 399 · 15.5%High 53 · 2.1%

Preoperative enteral nutrition (standard formula) vs usual care or control

Infectious complications · people undergoing gastrointestinal surgery

It is very uncertain whether preoperative enteral nutrition (standard formula) changes infectious complications compared with usual care or control (very low certainty).

1 finding from 1 review

Immune‐enhancing supplements (oral or enteral) vs usual care or control

Non‐infectious complications · people undergoing gastrointestinal surgery

Immune‐enhancing supplements (oral or enteral) showed no clear difference in non‐ infectious complications recorded up to 30 days postdischarge compared with usual care or control (low certainty).

1 finding from 1 review

Mobile phone text messages vs usual care

Fatal cardiovascular events (percentage of people having fatal cardiovascular events) · people with established arterial occlusive events

Mobile phone text messaging showed no clear difference in fatal cardiovascular events (percentage of people having fatal… compared with usual care (low certainty).

1 finding from 1 review

Non‐invasive brain stimulation vs usual care with or without sham interventions

Depression: meeting study criteria for depression at end of · people with depression after stroke
2 findings from 1 review