Skip to main content

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