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Personal and Environmental Risk Factors at Birth and Hospital Admission: Direct and Vitamin D-Mediated Effects on Bronchiolitis Hospitalization in Italian Children

Author

Listed:
  • Marco Zaffanello

    (Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, 37126 Verona, Italy
    M.Z. and G.F. should be considered joint first author.)

  • Giuliana Ferrante

    (Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, 90127 Palermo, Italy
    M.Z. and G.F. should be considered joint first author.)

  • Salvatore Fasola

    (Institute for Biomedical Research and Innovation, National Research Council, 90146 Palermo, Italy)

  • Michele Piazza

    (Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, 37126 Verona, Italy)

  • Giorgio Piacentini

    (Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, 37126 Verona, Italy
    G.P. and S.L.G. should be considered joint senior author.)

  • Stefania La Grutta

    (Institute for Biomedical Research and Innovation, National Research Council, 90146 Palermo, Italy
    G.P. and S.L.G. should be considered joint senior author.)

Abstract

Seasonal variations in UV-B radiation may influence vitamin D status, and this, in turn, may influence the risk of bronchiolitis hospitalization. The aim of this study was using a causal inference approach to investigate, simultaneously, the interrelationships between personal and environmental risk factors at birth/hospital admission (RFBH), serum vitamin D levels and bronchiolitis hospitalization. A total of 63 children (<2 years old) hospitalized for bronchiolitis (34 RSV-positive) and 63 controls were consecutively enrolled (2014–2016). Vitamin D levels and some RFBH (birth season, birth weight, gestational age, gender, age, weight, hospitalization season) were recorded. The discovered RFBH effects on the risk ok bronchiolitis hospitalization were decomposed into direct and vitamin-D mediated ones through Mediation Analysis. Winter-spring season (vs. summer-autumn) was significantly associated with lower vitamin D levels (mean difference −11.14 nmol/L). Increasing serum vitamin D levels were significantly associated with a lower risk of bronchiolitis hospitalization (OR = 0.84 for a 10-nmol/L increase). Winter-spring season and gestational age (one-week increase) were significantly and directly associated with bronchiolitis hospitalization (OR = 6.37 and OR = 0.78 respectively), while vitamin D-mediated effects were negligible (1.21 and 1.02 respectively). Using a comprehensive causal approach may enhance the understanding of the complex interrelationships among RFBH, vitamin D and bronchiolitis hospitalization.

Suggested Citation

  • Marco Zaffanello & Giuliana Ferrante & Salvatore Fasola & Michele Piazza & Giorgio Piacentini & Stefania La Grutta, 2021. "Personal and Environmental Risk Factors at Birth and Hospital Admission: Direct and Vitamin D-Mediated Effects on Bronchiolitis Hospitalization in Italian Children," IJERPH, MDPI, vol. 18(2), pages 1-9, January.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:2:p:747-:d:481722
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    References listed on IDEAS

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    1. Maria Elisa Di Cicco & Giuliana Ferrante & Doriana Amato & Antonino Capizzi & Carlo De Pieri & Valentina Agnese Ferraro & Maria Furno & Valentina Tranchino & Stefania La Grutta, 2020. "Climate Change and Childhood Respiratory Health: A Call to Action for Paediatricians," IJERPH, MDPI, vol. 17(15), pages 1-12, July.
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