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Development and inter-rater reliability of the Liverpool adverse drug reaction causality assessment tool.


ABSTRACT:

Aim

To develop and test a new adverse drug reaction (ADR) causality assessment tool (CAT).

Methods

A comparison between seven assessors of a new CAT, formulated by an expert focus group, compared with the Naranjo CAT in 80 cases from a prospective observational study and 37 published ADR case reports (819 causality assessments in total).

Main outcome measures

Utilisation of causality categories, measure of disagreements, inter-rater reliability (IRR).

Results

The Liverpool ADR CAT, using 40 cases from an observational study, showed causality categories of 1 unlikely, 62 possible, 92 probable and 125 definite (1, 62, 92, 125) and 'moderate' IRR (kappa 0.48), compared to Naranjo (0, 100, 172, 8) with 'moderate' IRR (kappa 0.45). In a further 40 cases, the Liverpool tool (0, 66, 81, 133) showed 'good' IRR (kappa 0.6) while Naranjo (1, 90, 185, 4) remained 'moderate'.

Conclusion

The Liverpool tool assigns the full range of causality categories and shows good IRR. Further assessment by different investigators in different settings is needed to fully assess the utility of this tool.

SUBMITTER: Gallagher RM 

PROVIDER: S-EPMC3237416 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature

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Publications

Development and inter-rater reliability of the Liverpool adverse drug reaction causality assessment tool.

Gallagher Ruairi M RM   Kirkham Jamie J JJ   Mason Jennifer R JR   Bird Kim A KA   Williamson Paula R PR   Nunn Anthony J AJ   Turner Mark A MA   Smyth Rosalind L RL   Pirmohamed Munir M  

PloS one 20111214 12


<h4>Aim</h4>To develop and test a new adverse drug reaction (ADR) causality assessment tool (CAT).<h4>Methods</h4>A comparison between seven assessors of a new CAT, formulated by an expert focus group, compared with the Naranjo CAT in 80 cases from a prospective observational study and 37 published ADR case reports (819 causality assessments in total).<h4>Main outcome measures</h4>Utilisation of causality categories, measure of disagreements, inter-rater reliability (IRR).<h4>Results</h4>The Liv  ...[more]

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