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01.12.2018 | Research article | Ausgabe 1/2018 Open Access

The Journal of Headache and Pain 1/2018

Validation of a self-reported instrument to assess work-related difficulties in patients with migraine: the HEADWORK questionnaire

Zeitschrift:
The Journal of Headache and Pain > Ausgabe 1/2018
Autoren:
Alberto Raggi, Venusia Covelli, Erika Guastafierro, Matilde Leonardi, Chiara Scaratti, Licia Grazzi, Marco Bartolini, Giovanna Viticchi, Sabina Cevoli, Giulia Pierangeli, Gioacchino Tedeschi, Antonio Russo, Piero Barbanti, Cinzia Aurilia, Carlo Lovati, Luca Giani, Fabio Frediani, Paola Di Fiore, Francesco Bono, Laura Rapisarda, Domenico D’Amico
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Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1186/​s10194-018-0914-7) contains supplementary material, which is available to authorized users.

Abstract

Background

The degree to which work-related difficulties are recognized in headache research is poor and often carried out with inadequate information such as “reduced ability to work as usual”, which do not capture at all the variety of difficulties and the factors that impact over them. The aim of this paper is to present the validation of the HEADWORK questionnaire, which addresses the amount and severity of difficulties in work-related tasks and the factors that impact over them.

Methods

We developed a set of items based on a previous literature review and patients’ focus groups and tested it on a wide set of patients with episodic and chronic migraine attending eight different Italian headache centers. HEADWORK factor structure was assessed with exploratory and confirmatory factor analysis; internal consistency and construct validity were addressed as well.

Results

The validation sample (N = 373) was mostly composed of patients with episodic migraine without aura (64.3%) and of females (81%). Factor analysis retrieved two different scales: “Work-related difficulties”, composed of eleven items which explain 67.1% of the total variance, and “Factors contributing to work difficulties”, composed of six items which explain 52.1% of the total variance. Both HEADWORK subscales have good measurement properties, with higher scores being associated to higher disability, lower quality of life, lower productivity, higher headache frequency and pain intensity.

Conclusions

HEADWORK is a 17-item, two-scale questionnaire addressing the impact of migraine on work-related difficulties in terms of difficulties in general or specific skills, and the factors contributing to these difficulties, defined as negative impact on work tasks. It can be used to address disability weights for the purpose of calculating the burden of migraine, and to assess the balance between therapeutic and side effects of medication on productivity.
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