Survival in individuals with severe alpha 1-antitrypsin deficiency (PiZZ) in comparison to a general population with known smoking habits

Research output: Contribution to journalArticle

Abstract

Knowledge about the natural history of severe alpha 1-antitrypsin (AAT) deficiency (PiZZ) is limited. Our aim was to compare the survival of PiZZ individuals with randomly selected controls from the Swedish general population. The PiZZ subjects (n=1585) were selected from the Swedish National AATD Register. The controls (n=5999) were randomly selected from the Swedish population register. Smoking habits were known for all subjects. Median follow-up times for the PiZZ subjects (731 never-smokers) and controls (3179 never-smokers) were 12 and 17 years, respectively (p<0.001). During follow-up, 473 PiZZ subjects (30%), and 747 controls (12%) died. The PiZZ subjects had a significantly shorter survival time than the controls, p<0.001. After adjustment for gender, age, smoking habits and presence of respiratory symptoms, the risk of death was still significantly higher for the PiZZ individuals than for the controls, hazard ratio (HR) 3.2 (95% CI 2.8-3.6; p<0.001). By contrast, the risk of death was not increased in never-smoking PiZZ individuals identified by screening, compared to never-smoking controls, HR 1.2 (95% CI 0.6-2.2). The never-smoking PiZZ individuals identified by screening had a similar life expectancy to the neversmokers in the Swedish general population. Early diagnosis of AAT deficiency is of utmost importance.

Details

Authors
Organisations
External organisations
  • Skåne University Hospital
  • Umeå University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Respiratory Medicine and Allergy

Keywords

  • alpha 1-antitrypsin, Smoking, Survival
Original languageEnglish
Article number00198
JournalEuropean Respiratory Journal
Volume50
Issue number3
Publication statusPublished - 2017 Sep 1
Publication categoryResearch
Peer-reviewedYes