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What do systematic reviews say?

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Evidence found and GRADE certainty

279 questions · 284 findings · 30 reviews

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No studies found 75 · 26.4%GRADE not reported 8 · 2.8%Very low 81 · 28.5%Low 65 · 22.9%Moderate 51 · 18%High 4 · 1.4%

Drain use vs No drain

Intra‐abdominal infection · people undergoing elective pancreatic resections

It is very uncertain whether drain use changes intra‐abdominal infection compared with no drain use following pancreatic surgery (very low certainty).

1 finding from 1 review

Drain use vs No drain

Wound infection · people undergoing elective pancreatic resections

Drain use showed no clear difference in wound infection compared with no drain use following pancreatic surgery (low certainty).

1 finding from 1 review

Drain use vs No drain

Morbidity · people undergoing elective pancreatic resections

Drain use showed no clear difference in morbidity compared with no drain use following pancreatic surgery (moderate certainty).

1 finding from 1 review

Drain use vs No drain

Length of hospital stay · people undergoing elective pancreatic resections

Drain use showed no clear difference in length of hospital stay compared with no drain use following pancreatic surgery (low certainty).

1 finding from 1 review

Active drain vs passive drain

All‐cause mortality · people undergoing elective pancreatic resections

It is very uncertain whether active drain changes mortality compared with passive drain following pancreatic surgery (very low certainty).

2 findings from 1 review

Intervention not reported

Number of exacerbations of upper respiratory tract symptoms · infants and young children with cystic fibrosis

The intervention showed no clear difference in number of exacerbations of upper respiratory tract symptoms (moderate certainty).

1 finding from 1 review