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Table 2 Quality assessment according to the Newcastle-Ottawa Scale

From: The effect of bystander cardiopulmonary resuscitation on the survival of out-of-hospital cardiac arrests: a systematic review and meta-analysis

Study

Selection

Comparability

Outcome

Total

Cummins(1985)

4

2

2

8

Swor(1995)

4

2

2

8

Weston(1997)

3

2

2

7

Stiell(1999)

3

2

2

7

Holmberg(2000)

3

2

2

7

Finn(2001)

4

1

2

7

Herlitz(2003)

3

1

2

6

Herlitz(2005)

4

2

2

8

Iwami(2007)

4

2

2

8

Herlitz(2008)

3

2

2

7

Nordberg(2009)

3

2

2

7

Lindner(2011)

3

2

2

7

Wissenberg(2013)

4

1

2

7

Lai(2015)

3

2

2

7

Nehme(2015)

3

2

2

7

Hasselqvist-Ax(2015)

4

2

2

8

Gaieski(2017)

4

2

2

8

Tanaka(2017)

4

2

2

8

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Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine

ISSN: 1757-7241