Residential Radon and Small Cell Lung Cancer. Final Results of the Small Cell Study

• Ángeles Rodríguez-Martínez ^[3] ; Alberto Ruano-Ravina ^[1] ; María Torres-Durán ^[4] ; Mariano Provencio ^[5] ; Isaura Parente-Lamelas ^[6] ; Iria Vidal-García ^[7] ; Cristina Martínez ^[8] ; Jesús Hernández-Hernández ^[9] ; Ihab Abdulkader-Nallib ^[10] ; Olalla Castro-Añón ^[11] ; Leonor Varela-Lema ^[1] ; María Piñeiro-Lamas ^[12] ; Paula SalesFidalgo ^[2] ; Alberto Fernández-Villar ^[4] ; Juan Barros-Dios ^[12] ; Mónica Pérez-Ríos ^[1]
  1. [1] Universidade de Santiago de Compostela

     Universidade de Santiago de Compostela

     Santiago de Compostela, España

     
  2. [2] Centro Hospitalar do Porto

     Centro Hospitalar do Porto

     Santo Ildefonso, Portugal

     
  3. [3] Service of Medical Oncology, University Hospital Complex of Pontevedra, Spain
  4. [4] Service of Neumology, University Hospital Complex of Vigo, Spain
  5. [5] Service of Medical Oncology, Puerta del Hierro University Hospital of Madrid, Spain
  6. [6] Service of Neumology, University Hospital Complex of Ourense, Spain
  7. [7] Service of Neumology, University Hospital Complex of A Coruña, Spain
  8. [8] National Institute of Silicosis, University Hospital of Asturias, Oviedo, Spain
  9. [9] Service of Neumology, University Hospital of Ávila, Spain
  10. [10] Service of Pathological Anatomy, University Complex of Santiago de Compostela, Spain
  11. [11] Service of Neumology, Universitary Hospital Complex of Lugo, Spain
  12. [12] Consortium for Biomedical Research in Epidemiology and Public Health (CIBER en Epidemiología y Salud Pública, CIBERESP), Spain

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• Localización: Archivos de bronconeumología: Organo oficial de la Sociedad Española de Neumología y Cirugía Torácica SEPAR y la Asociación Latinoamericana de Tórax ( ALAT ), ISSN 0300-2896, Vol. 58, Nº. 7, 2022, págs. 542-546
• Idioma: inglés
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• Resumen

  • Introduction Residential radon is considered the second cause of lung cancer and the first in never smokers. Nevertheless, there is little information regarding the association between elevated radon levels and small cell lung cancer (SCLC). We aimed to assess the effect of residential radon exposure on the risk of SCLC in general population through a multicentric case–control study.

    Methods A multicentric hospital-based case–control study was designed including 9 hospitals from Spain and Portugal, mostly including radon-prone areas. Indoor radon was measured using Solid State Nuclear Track Detectors at the Galician Radon Laboratory.

    Results A total of 375 cases and 902 controls were included, with 24.5% of cases being women. The median number of years living in the measured dwelling was higher than 25 years for both cases and controls. There was a statistically significant association for those exposed to concentrations higher than the EPA action level of 148 Bq/m3, with an Odds Ratio of 2.08 (95%CI: 1.03–4.39) compared to those exposed to concentrations lower than 50 Bq/m3. When using a dose-response model with 100 Bq/m3 as a reference, it can be observed a linear effect for small cell lung cancer risk. Smokers exposed to higher radon concentrations pose a much higher risk of SCLC compared to smokers exposed to lower indoor radon concentrations.

    Conclusions Radon exposure seems to increase the risk of small cell lung cancer with a linear dose-response pattern. Tobacco consumption may also produce an important effect modification for radon exposure.