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Table 1 Characteristics and quality of the included studies

From: Extracorporeal membrane oxygenation (ECMO) in patients with severe COVID-19 adult respiratory distress syndrome: a systematic review and meta-analysis

Study (author and year)

Country

Design

Setting

NOS

Follow-up

Primary end point

Zhou et al. (2020) [17]

China

Observational

Single center

4 (2,0,2)

In hospital

Death

Zhang et al. (2020) [18]

China

Observational

Single center

4 (2,0,2)

In hospital

Death

Takeda et al. (2020) [19]

Japan

Observational

Multicenter

4 (2,0,2)

In hospital

Death

Jacobs et al. (2020) [20]

USA

Observational

Multicenter

4 (2,0,2)

In hospital

Death

Yang et al. (2020) [21]

China

Observational

Single center

6 (2,2,2)

In hospital

Death

Ruan et al. (2020) [22]

China

Observational

Single center

6 (2,2,2)

In hospital

Death

Li et al. (2020) [23]

China

Observational

Single center

6 (2,2,2)

In hospital

Death

Guan et al. (2020) [24]

China

Observational

Single center

6 (2,2,2)

In hospital

Death

Zeng et al. (2020) [25]

China

Observational

Single center

4 (2,0,2)

In hospital

Death

Beyls et al. (2020) [26]

France

Observational

Single center

5 (3,0,2)

4 weeks after discharge

Death

Osho et al. (2020) [27]

USA

Observational

Single center

4 (2,0,2)

In hospital

Death

Haye et al. (2020) [28]

France

Observational

Single center

4 (2,0,2)

In hospital

Death

  1. NOS Newcastle-Ottawa scale (total score with 3 numbers of subdivision: selection of study groups, comparability of groups, and ascertainment of exposure)