Spirometry to increase smoking cessation rate: A systematic review
Elisabeth Westerdahl 1, 2  
Mats Arne 4, 5
Matz Larsson 6, 7, 8
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Centre for Assessment of Medical Technology in Örebro, Region Örebro County, Örebro, Sweden
Department of Physiotherapy, University Health Care Research Center, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
Sörmland County Council, Medical Advisory Committee, Nyköping, Sweden
Centre for Clinical Research, Region Värmland, Karlstad, Sweden
Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
Clinical Health Promotion Centre, Lund University, Lund, Sweden
The Heart, Lung and Physiology Clinic, Örebro University Hospital, Örebro, Sweden
School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
Elisabeth Westerdahl   

Centre for Assessment of Medical Technology in Örebro, Region Örebro County, 701 16 Örebro, Sweden
Publish date: 2019-04-17
Tob. Induc. Dis. 2019;17(April):31
Addressing tobacco use is an important issue in general health care. In order to improve smoking cessation advice, spirometry values can be displayed to the smoker to demonstrate possible lung function impairment. The estimate of so-called lung age may show a decrease in lung function associated with smoking. It has been suggested that performing spirometry on patients who smoke but are asymptomatic can be a useful way to show the adverse effects of smoking. The aim of this systematic review was to determine if providing spirometry results in combination with smoking cessation counselling can increase smoking cessation rates compared to what is achieved through counselling alone.

In this systematic review, we included randomized controlled trials (RCTs) evaluating smoking cessation interventions for adult smokers. The systematic search was performed in PubMed, Medline, Cochrane Library, Cinahl, Embase, Amed and PsycInfo.

The literature search resulted in 946 studies, which, after reading by two independent reviewers, were reduced to seven trials that matched the inclusion criteria. Two RCTs showed significant improvement in smoking cessation when giving patients feedback on spirometry results in combination with smoking cessation counselling, compared to patients who received only smoking cessation counselling. In both studies, the spirometry results were expressed as lung age. In the other five studies no difference was found. Five further published study protocols for ongoing RCT studies in the field have been found, and therefore this systematic overview will likely need to be updated within a few years.

Few studies have been undertaken to examine the efficacy of spirometry in increasing patient quit rates. Studies conducted to date have shown mixed results, and there is currently limited evidence in the literature that smoking cessation counselling that includes feedback from spirometry and a demonstration of lung age promotes quit rates.

The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none was reported.
There was no source of funding for this research.
Not commissioned; externally peer reviewed.
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