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Airflow limitation classified with the fixed ratio or the lower limit of normal and cause-specific mortality: a prospective study
Section of Occupational and Environmental Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden.
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.ORCID-id: 0000-0001-7222-6402
Section of Occupational and Environmental Medicine, Sahlgrenska Academy, University of Gothenburg, Box 414, SE-405 30, Gothenburg, Sweden; Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden.
Division of Occupational and Environmental Medicine, Department of Medicine, University of California, San Francisco, CA, USA.
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2018 (Engelska)Ingår i: Respiratory Medicine, ISSN 0954-6111, E-ISSN 1532-3064, Vol. 144, s. 36-41Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: There is controversy as to whether airflow limitation should be defined as forced expiratory volume in 1 s (FEV1)/vital capacity (VC) < 0.7 or as FEV1/VC< the lower limit of normal (LLN). The aim was to examine whether different definitions of airflow limitation differ in predicting mortality.

METHODS: Longitudinal prospective study of a national cohort of Swedish workers (199,408 men; 7988 women), aged 20-64 years with spirometry without bronchodilation at baseline followed from 1979 until death, or censorship at 2010. Airflow limitation (AL) by Global Obstructive Lung Disease criteria, ALGOLD, was defined as FEV1/VC < 0.7; ALLLN as FEV1/VC < LLN. All all-cause, COPD and cardiovascular disease mortality was analyzed among men and women in relation to ALGOLD and ALLLN, adjusted for age and smoking.

RESULTS: Among men, all-cause mortality risks were similar by airflow limitation criteria: ALGOLD RR = 1.32, 95% CI 1.26-1.38; ALLLN, RR = 1.37, 95% CI 1.31-1.44. The risk estimates were also similar by airflow limitation definition for cardiovascular mortality and for COPD mortality. Among women, all-cause mortality was also similar by airflow limitation criteria, but significantly higher as compared to men: ALGOLD RR = 2.10, 95% CI 1.66-2.66; ALLLN, RR = 2.09, 95% CI 1.66-2.62. Also cardiovascular and COPD mortality by airflow limitation criteria was significantly higher among women as compared to men.

CONCLUSIONS: Defined either as FEV1/VC < 0.7 or as FEV1/VC < LLN, airflow limitation predicted excess mortality risk of similar magnitude. Mortality in relation to airflow limitation was higher among women compared to men.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018. Vol. 144, s. 36-41
Nyckelord [en]
COPD, Epidemiology, GOLD, Never smokers, Spirometry, Women
Nationell ämneskategori
Arbetsmedicin och miljömedicin
Identifikatorer
URN: urn:nbn:se:umu:diva-153027DOI: 10.1016/j.rmed.2018.10.001ISI: 000448159000006PubMedID: 30366582OAI: oai:DiVA.org:umu-153027DiVA, id: diva2:1260320
Tillgänglig från: 2018-11-02 Skapad: 2018-11-02 Senast uppdaterad: 2018-12-07Bibliografiskt granskad

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Andersson, MartinJärvholm, Bengt

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