Findings

What do systematic reviews say?

10 questions · 10 findings · 2 reviews · Colorectal · Headline outcomes only

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No studies found 3 · 30%GRADE not reported 0 · 0%Very low 2 · 20%Low 5 · 50%Moderate 0 · 0%High 0 · 0%

Drainage vs no drainage after open appendectomy

Intraperitoneal abscess · people undergoing emergency open appendectomy for complicated appendicitis

It is very uncertain whether drainage changes intraperitoneal abscess compared with no drainage after open appendectomy (very low certainty).

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
RR 1.23 [0.47, 3.21]
5 studies · 453 participants
Very low

Drainage vs no drainage after open appendectomy

Wound infection · people undergoing emergency open appendectomy for complicated appendicitis

It is very uncertain whether drainage changes wound infection compared with no drainage after open appendectomy (very low certainty).

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
RR 2.01 [0.88, 4.56]
5 studies · 478 participants
Very low

Drainage vs no drainage after open appendectomy

Morbidity · people undergoing emergency open appendectomy for complicated appendicitis

Drainage may leads to higher morbidity compared with no drainage after open appendectomy (low certainty).

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
RR 6.67 [2.13, 20.87]
1 study · 90 participants
Low

Drainage vs no drainage after open appendectomy

All‐cause mortality · people undergoing emergency open appendectomy for complicated appendicitis

Drainage may leads to higher mortality compared with no drainage after open appendectomy (low certainty).

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
Peto OR 4.88 [1.18, 20.09]
4 studies · 363 participants
Low

Drainage vs no drainage after open appendectomy

Length of hospital stay · people undergoing emergency open appendectomy for complicated appendicitis

Drainage showed no clear difference in hospital stay (days) compared with no drainage after open appendectomy (low certainty).

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
MD 2.17
3 studies · 298 participants
Low

Drainage vs no drainage after open appendectomy

Hospital costs · people undergoing emergency open appendectomy for complicated appendicitis

The review found no eligible studies for this question.

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Drainage vs no drainage after open appendectomy

Pain · people undergoing emergency open appendectomy for complicated appendicitis

The review found no eligible studies for this question.

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Drainage vs no drainage after open appendectomy

Quality of life · people undergoing emergency open appendectomy for complicated appendicitis

The review found no eligible studies for this question.

1 finding from 1 review

Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Intra‐abdominal drainage vs no drainage after pelvic lymphadenectomy

Anastomotic leakage/dehiscence · unselected population undergoing elective colorectal anastomosis

Intra‐abdominal drainage showed no clear difference in anastomotic dehiscence compared with no drainage (low certainty).

1 finding from 1 review

Intra‐abdominal drains for the prophylaxis of anastomotic leak in elective colorectal surgery 2004 · Cochrane Headline outcomes only
RR 1.4 [0.45, 4.4]
2 studies · 809 participants
Low

Intra‐abdominal drainage vs no drainage after pelvic lymphadenectomy

All‐cause mortality · unselected population undergoing elective colorectal anastomosis

Intra‐abdominal drainage showed no clear difference in mortality compared with no drainage (low certainty).

1 finding from 1 review

Intra‐abdominal drains for the prophylaxis of anastomotic leak in elective colorectal surgery 2004 · Cochrane Headline outcomes only
RR 0.77 [0.41, 1.45]
3 studies · 908 participants
Low