ERJ Open Research (Dec 2021)

Spirometric phenotypes from early childhood to young adulthood: a Chronic Airway Disease Early Stratification study

  • Gang Wang,
  • Jenny Hallberg,
  • Dimitrios Charalampopoulos,
  • Maribel Casas Sanahuja,
  • Robab Breyer-Kohansal,
  • Arnulf Langhammer,
  • Raquel Granell,
  • Judith M. Vonk,
  • Annemiek Mian,
  • Núria Olvera,
  • Lisbeth Mølgaard Laustsen,
  • Eva Rönmark,
  • Alicia Abellan,
  • Alvar Agusti,
  • Syed Hasan Arshad,
  • Anna Bergström,
  • H. Marike Boezen,
  • Marie-Kathrin Breyer,
  • Otto Burghuber,
  • Anneli Clea Bolund,
  • Adnan Custovic,
  • Graham Devereux,
  • Gavin C. Donaldson,
  • Liesbeth Duijts,
  • Ana Esplugues,
  • Rosa Faner,
  • Ferran Ballester,
  • Judith Garcia-Aymerich,
  • Ulrike Gehring,
  • Sadia Haider,
  • Sylvia Hartl,
  • Helena Backman,
  • John W. Holloway,
  • Gerard H. Koppelman,
  • Aitana Lertxundi,
  • Turid Lingaas Holmen,
  • Lesley Lowe,
  • Sara M. Mensink-Bout,
  • Clare S. Murray,
  • Graham Roberts,
  • Linnea Hedman,
  • Vivi Schlünssen,
  • Torben Sigsgaard,
  • Angela Simpson,
  • Jordi Sunyer,
  • Maties Torrent,
  • Stephen Turner,
  • Maarten Van den Berge,
  • Roel C.H. Vermeulen,
  • Sigrid Anna Aalberg Vikjord,
  • Jadwiga A. Wedzicha,
  • Anke H. Maitland van der Zee,
  • Erik Melén

DOI
https://doi.org/10.1183/23120541.00457-2021
Journal volume & issue
Vol. 7, no. 4

Abstract

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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 49 334 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 <LLN. 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.