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Work. 2014 Jun 16. [Epub ahead of print]

Stability and reproducibility of semi-quantitative risk assessment methods within the occupational health and safety scope.

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  • 1Secção Autónoma de Ergonomia & CIPER, Faculdade de Motricidade Humana, Universidade Técnica de Lisboa, Cruz Quebrada, Portugal.

Abstract

BACKGROUND:

In many enterprises the semi-quantitative approach turns out to be the available and most suitable technique to perform a risk assessment. Despite its advantages, we cannot disregard the existing gap in terms of validation of this type of applications.

OBJECTIVE:

This paper reports a study about risk assessments' reliability, namely both inter-coder (reproducibility) and intra-coder (stability) reliability of the semi-quantitative approach.

METHODS:

This study comprised 4 fundamental stages. Data collection relied on free and systematized observations and made use of video recording, documental research, analysis grids and questionnaires specifically developed for this purpose. A set of different analysts were asked to use four semi-quantitative risk assessment methods (in two different moments) to estimate and assess six risks identified in two tasks accomplished to produce Airbags. The Krippendorff's Alpha Coefficient (α<formula> _K</formula>) was the agreement measure selected to evaluate both inter-coder and intra-coder consensus.

RESULTS:

The preliminary results revealed a general low concordance (α<formula> _K</formula> < 0.6) for both reliability evaluations. Apparently there are no relevant differences between the risk assessment results obtained by individuals with different levels of experience or expertise.

CONCLUSIONS:

This study revealed that the use of the semi-quantitative approach should be done with caution.

KEYWORDS:

Krippendorff's alpha coefficient; Reliability; inter-coder assessment; intra-coder assessment

PMID:
24939116
[PubMed - as supplied by publisher]
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