Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

323 questions · 366 findings · 43 reviews

No studies found 135 · 36.9%GRADE not reported 40 · 10.9%Very low 85 · 23.2%Low 65 · 17.8%Moderate 38 · 10.4%High 3 · 0.8%

Low tidal volume vs high tidal volume

All‐cause mortality · adults (aged > 16 years) without acute lung injury needing mechanical positive pressure ventilation during their surgery and undergoing…

Low tidal volume showed no clear difference in mortality compared with high tidal volume (low certainty).

1 finding from 1 review

Low tidal volume vs high tidal volume

Pneumonia · adults (aged > 16 years) without acute lung injury needing mechanical positive pressure ventilation during their surgery and undergoing…

Low tidal volume probably leads to lower pneumonia compared with high tidal volume (moderate certainty).

1 finding from 1 review

Low tidal volume vs high tidal volume

Need for postoperative non‐invasive ventilatory support · adults (aged > 16 years) without acute lung injury needing mechanical positive pressure ventilation during their surgery and undergoing…

Low tidal volume probably leads to lower need for postoperative non‐invasive ventilatory support compared with high tidal volume (moderate certainty).

1 finding from 1 review

Low tidal volume vs high tidal volume

Need for postoperative invasive ventilatory support · adults (aged > 16 years) without acute lung injury needing mechanical positive pressure ventilation during their surgery and undergoing…

Low tidal volume probably leads to lower need for postoperative invasive ventilatory support compared with high tidal volume (moderate certainty).

1 finding from 1 review

Low tidal volume vs high tidal volume

Barotrauma (pneumothorax) · adults (aged > 16 years) without acute lung injury needing mechanical positive pressure ventilation during their surgery and undergoing…

It is very uncertain whether low tidal volume changes barotrauma: pneumothorax compared with high tidal volume (very low certainty).

1 finding from 1 review

Arthroscopy vs open surgery

Tenderness on palpation in jaw muscles (clinical evaluation, 12 months) · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in tenderness on palpation in jaw muscles (clinical evaluation, 12… compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Tenderness on palpation in TMJ (clinical evaluation, 12 months) · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in tenderness on palpation in TMJ (clinical evaluation, 12 months) compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Maximum protrusion over 5 mm (clinical evaluation, 12 months) · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in maximum protrusion over 5 mm (clinical evaluation, 12 months) compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Pain (VAS/SSI) after 12 months · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy led to higher pain (VAS/SSI) after 12 months compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Crepitation (clinical evaluation, 12 months) · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in crepitation (clinical evaluation, 12 months) compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Click (clinical evaluation, 12 months) · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in click (clinical evaluation, 12 months) compared with open surgery; GRADE not reported.

1 finding from 1 review

Arthroscopy vs open surgery

Mandibular functionality (MFIQ) after 12 months · Adults (older than 18 years) with a temporomandibular disorder (synovitis, disc displacement with or without reduction, myofascial…

Arthroscopy showed no clear difference in mandibular functionality (MFIQ) after 12 months compared with open surgery; GRADE not reported.

1 finding from 1 review

Guided tissue regeneration (GTR) with barrier membrane (resorbable or non-resorbable) vs Open flap debridement (access flap surgery)

Sites failing to gain 2 mm attachment (proportion) · Patients with chronic periodontitis (aged 21 years or older) with periodontal infra-bony defects; furcation-involved teeth and aggressive…

Guided tissue regeneration (GTR) with barrier membrane (resorbable… led to lower sites failing to gain 2 mm attachment (proportion) compared with open flap debridement (access flap surgery); GRADE not reported.

1 finding from 1 review