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Table 1 Summary of the studies included in this systematic review and meta-analysis

From: Video laryngoscopy versus direct laryngoscopy in achieving successful emergency endotracheal intubations: a systematic review and meta-analysis of randomized controlled trials

Study ID

Groups (interventions)

Country

Population

Type of laryngoscope

Ahmadi (2014) [18]

Direct-L

Iran

Patients admitted to ED and need emergency intubation

Macintosh laryngoscope

Video-L

GlideScope video laryngoscope

Ajith (2022) [19]

Direct-L

India

Critically injured patients requiring emergency intubation

Macintosh laryngoscope

Video-L

McGrath MAC video laryngoscope

Arima (2014) [20]

Direct-L

Japan

The study included patients who were 18 years or older and required emergency tracheal intubation during daylight hours in the prehospital setting

Macintosh laryngoscope

Video-L

Airway scope (AWS; Pentax)

Driver (2016) [21]

Direct-L

USA

Participants who had undergone emergent intubation or were at high risk of requiring intubation

C-MAC video laryngoscope with covered screen

Video-L

C-MAC video laryngoscope

Goksu (2016) [22]

Direct-L

Turkey

Patients over the age of 16, arriving at the ED due to blunt trauma requiring endotracheal intubation to secure the airway

Standard laryngoscope

Video-L

C-MAC video laryngoscope

Ilbagi (2021) [23]

Direct-L

Iran

Patients with suitability for intubation, age between 18 and 65 years, the absence of anatomical issues in the neck and trachea, and no history of drug addiction

Macintosh laryngoscope

Video-L

GlideScope video laryngoscope

Kim (2016) [24]

Direct-L

Korea

Adult patients who suffered out-of-hospital or inhospital cardiac arrest and required intubation during cardiopulmonary resuscitation

Standard laryngoscope

Video-L

GlideScope video laryngoscope

Loughnan (2019) [25]

Direct-L

New Zealand

All adult patients (age > 18 years old) who needed endotracheal intubation upon arrival at the emergency department

Macintosh laryngoscope

Video-L

McGrath MAC video laryngoscope

Macke (2020) [26]

Direct-L

Germany

Patients needed emergency intubation

Standard laryngoscope

Video-L

C-MAC video laryngoscope

Noppens (2012) [27]

Direct-L

Germany

Patients in the ICU and need intubation

Macintosh laryngoscope

Video-L

C-MAC video laryngoscope

Sanguanwit (2021) [28]

Direct-L

Thailand

All adult patients (age > 18 years old) who needed endotracheal intubation upon arrival at the emergency department

Standard laryngoscope

Video-L

GlideScope video laryngoscope

Sulser (2016) [29]

Direct-L

Switzerland

Patients aged between 18 and 99 years undergoing emergency rapid sequence intubation in the emergency room

Macintosh laryngoscope

Video-L

C-MAC video laryngoscope

Sun (2020) [30]

Direct-L

China

Patients with respiratory failure, who needed endotracheal intubation upon arrival at the emergency department

Not clearly defined

Video-L

Not clearly defined

Yeatts (2013) [31]

Direct-L

USA

All patients who required tracheal intubation

Standard laryngoscope

Video-L

GlideScope video laryngoscope