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Table 2 Newcastle-Ottawa quality assessment scale ratings for the 7 cohort studies included

From: Risk markers for fatal and non-fatal prescription drug overdose: a meta-analysis

 

Selection

   

Comparability

Outcome

Total score

Representative of exposed cohort

Selections of non exposed cohort

Assessment of exposure

Absence of outcome at start of study

Comparability

Assessment of outcome

Follow-up period (≥ 6 months)

Adequacy of follow-up

Out of 9 points

Bauer et al. 2016

1

1

1

1

2

1

1

0

8 (high)

Bohnert et al. 2012

1

1

1

1

2

1

1

0

8 (high)

Caudarella et al. 2016

1

1

1

1

2

1

1

1

9 (high)

Dunn et al. 2010

1

1

1

1

2

1

1

0

8 (high)

Hartung et al. 2007

1

1

1

1

2

1

1

0

8 (high)

Seal et al. 2012

1

1

1

1

2

1

1

0

8 (high)

Turner and Liang 2015

1

1

1

1

2

1

1

0

8 (high)

        

mean

8.1