Prevalence of Work-Related Asthma in Primary Health Care: Study Rationale and Design

Ventura Rabell-Santacana*, 1, Rafael Panadès-Valls2, Rosa Vila-Rigat3, Enric Hernandez-Huet4, Joan Sivecas-Maristany5, Xavier Blanché-Prat6, Gemma Prieto7, Laura Muñoz8, Pere Torán8, and Respiratory Research Group of Vallès Oriental (GRRVO)
1 Primary Healthcare Centre Vallès Oriental, Catalan Health Institute, Carrer del Museu, 19, 08401 Granollers, Spain
2 Health and Safety Occupational Centre, Department of Business and Occupation, Plaça Eusebi Güell 4-5, 08034 Barcelona, Spain
3 Primary Healthcare Centre La Garriga, Catalan Health Institute, Carrer Torrent de la Sínia 7, 08530 La Garriga, Spain
4 Primary Healthcare Centre Les Franqueses del Vallès, Catalan Health Institute, Carrer de Girona 290, 08520 Les Franqueses del Vallès, Spain
5 Primary Healthcare Centre Can Borràs, Catalan Health Institute Carrer, Balmes 51, 08440 Cardedeu, Spain
6 Primary Healthcare Centre Llinars del Vallès, Catalan Health Institute Carrer, Frederic Marès, s/n. 08450 Llinars del Vallès
7 Primary Care Management of Health of Ávila, Castilla y León (SACYL), Avenida de Portugal 47, 05001 Ávila, Spain
8 Primary Healthcare Research Support Unit Metropolitana Nord.IDIAP Jordi Gol, Carrer Major 49-53, 08921 Santa Coloma de Gramenet, Spain

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© Rabell-Santacana et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Primary Healthcare Centre Vallès Oriental, Catalan Health Institute, Carrer del Museu, 19, 08401 Granollers, Spain; Tel: 0034 93 860 05 22; Fax: 0034 93 870 60 04; E-mail:


Background :

Occupational Asthma (OA) is the most frequent origin of occupational respiratory diseases in industrialized countries and accounts for between 5% and 25% of asthmatic patients. The correct and early diagnosis of OA is of great preventive and socio-economic importance. However, few studies exist on OA’s prevalence in Catalonia and in Spain and those affected are mainly treated by the public health services and not by the occupational health services, which are private.

Objective :

To determine the prevalence of OA in patients diagnosed with asthma in the Primary Healthcare system and to evaluate the socio-economic impact of OA in the Primary Healthcare system.

Methods/Design :

We will carry out an observational, transversal and multi-center study in the Primary Healthcare Service in the Barcelona region (Catalonia, Spain), with 385 asthmatic workers aged between 16 and 64 who are currently working or have been working in the past. We will confirm the asthma diagnosis in each patient, and those meeting the inclusion criteria will be asked to answer a questionnaire that aims to link asthma to the patient’s past employment history. The resulting diagnosis will be of either occupational asthma, work-aggravated asthma or common asthma. We will also collect socio-demographic information about the patients, about their smoking status, their exposure outside of the workplace, their work situation at the onset of the symptoms, their employment history, their symptoms of asthma, their present and past medical asthma treatment, and, in order to estimate the economic impact in the Primary Healthcare system, where they have been attended to and treated. Prevalence will link OA or work-aggravated asthma to the total of patients participating in the study with a asthma diagnosis.

Discussion :

The results will show the prevalence of OA and work-aggravated asthma, and shall provide valuable information to set out and apply the necessary personal and technical measures, either in the public or in the occupational health services. No studies evaluating the costs generated by the OA in the Primary Healthcare system have been carried out.

Keywords: Epidemiology, occupational asthma, occupational health services, prevalence, primary health care.