Skip to main content

Table 1 Modified Newcastle-Ottawa quality assessment scale ratings for the 10 case-control or case-cohort studies included

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

 

Selection (score)

   

Comparability (score)

Exposure (score)

  

Total score

Case definition

Representative of cases

Selections of controls

Definition of controls

Control for important covariates

Ascertainment of exposure

Same method of ascertainment for participants

Nonresponse rate

Out of 10 points

Bohnert et al. 2011

1

1

2

1

2

1

1

1

10 (high)

Brady et al. 2015

1

1

2

1

2

1

1

1

10 (high)

Cerdá et al. 2013

1

1

1

1

2

1

1

1

9 (high)

Dilokthornsakul et al. 2016

1

1

2

1

2

1

1

1

10 (high)

Gomes et al. 2011

1

1

2

1

2

1

1

1

10 (high)

Lanier et al. 2012

1

1

1

1

2

0

0

0

6 (low)

Paulozzi et al. 2012

1

1

2

1

1

1

1

1

8 (high)

Peirce et al. 2012

1

1

2

1

0

1

1

1

8 (high)

Whitmire and Adams 2010

0

1

2

1

2

1

1

1

10 (high)

Zedler et al. 2014

1

1

2

1

2

1

1

1

10 (high)

        

mean

9.0