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Sökning: WFRF:(Breyer Kohansal Robab) > Karolinska Institutet

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1.
  • Wang, Gang, et al. (författare)
  • Spirometric phenotypes from early childhood to young adulthood : a Chronic Airway Disease Early Stratification study
  • 2021
  • Ingår i: ERJ Open Research. - : ERS Publications. - 2312-0541. ; 7:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The prevalences of obstructive and restrictive spirometric phenotypes, and their relation to early-life risk factors from childhood to young adulthood remain poorly understood. The aim was to explore these phenotypes and associations with well-known respiratory risk factors across ages and populations in European cohorts.Methods: We studied 49334 participants from 14 population-based cohorts in different age groups (⩽10, >10–15, >15–20, >20–25 years, and overall, 5–25 years). The obstructive phenotype was defined as forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC) z-score less than the lower limit of normal (LLN), whereas the restrictive phenotype was defined as FEV1/FVC z-score ⩾LLN, and FVC z-score Results: The prevalence of obstructive and restrictive phenotypes varied from 3.2–10.9% and 1.8–7.7%, respectively, without clear age trends. A diagnosis of asthma (adjusted odds ratio (aOR=2.55, 95% CI 2.14–3.04), preterm birth (aOR=1.84, 1.27–2.66), maternal smoking during pregnancy (aOR=1.16, 95% CI 1.01–1.35) and family history of asthma (aOR=1.44, 95% CI 1.25–1.66) were associated with a higher prevalence of obstructive, but not restrictive, phenotype across ages (5–25 years). A higher current body mass index (BMI was more often observed in those with the obstructive phenotype but less in those with the restrictive phenotype (aOR=1.05, 95% CI 1.03–1.06 and aOR=0.81, 95% CI 0.78–0.85, per kg·m−2 increase in BMI, respectively). Current smoking was associated with the obstructive phenotype in participants older than 10 years (aOR=1.24, 95% CI 1.05–1.46).Conclusion: Obstructive and restrictive phenotypes were found to be relatively prevalent during childhood, which supports the early origins concept. Several well-known respiratory risk factors were associated with the obstructive phenotype, whereas only low BMI was associated with the restrictive phenotype, suggesting different underlying pathobiology of these two phenotypes.
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2.
  • Melen, Erik, et al. (författare)
  • Spirometric phenotypes from early childhood to young adulthood - A CADSET (Chronic Airway Disease Early Stratification) study
  • 2020
  • Ingår i: European Respiratory Journal. - : ERS Publications. - 0903-1936 .- 1399-3003. ; 56:Suppl 64
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Results from longitudinal cohort studies show that the lower the lung function in childhood and adulthood, the higher the risk of later chronic airway disease such as COPD. Yet, reliable data is sparse on the prevalence of different types of lung function impairments in the general population of children and young adults, as well as their major determinants.Aim: To report age- and sex-specific prevalences and characteristics of spirometric phenotypes from childhood up to young adulthood.Methods: Lung function data from independent European population-based cohorts involved in the CADSET collaboration were analysed. Pre-bronchodilator FEV1 and FVC data from each cohort were converted into z-scores according to the Global Lung Initiative (GLI) reference system. Overall fit with the GLI spirometry equations was assessed. Airway limitation was defined as a FEV1/FVC z-score < -1.65.Results: Five cohorts provided spirometry data from 10,842 observations in subjects aged 7 to 25 years. Airway limitation was found in around 6-10% across all ages in the cohorts. No evidence of differences between males and females in different age groups were observed. In unadjusted analyses of all cohorts, we found maternal smoking during pregnancy to be associated with airway limitation (p<0.05).Conclusion: Analyses of spirometry data from population-based cohorts in Europe show that the prevalence of airflow limitation according to GLI is substantial (6-10%) and quite similar across cohorts and age groups. These results suggest that airflow limitation can develop early in life and that there are rather small changes in prevalence during childhood.
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