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Season of birth in amyotrophic lateral sclerosis

V Ajdacic-Gross1, J Wang, F Gutzwiller

  • 1Institute of Social and Preventive Medicine, Zurich, Switzerland.

European Journal of Epidemiology
|August 5, 1998
PubMed

Insights

Amyotrophic Lateral Sclerosis (ALS) risk may be linked to birth season. This study found more ALS cases were born in spring, suggesting early-life factors influence the disease over a long period.

Area of Science:

  • Neurology
  • Epidemiology
  • Public Health

Background:

  • Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disease.
  • Understanding the etiology of ALS is crucial for developing effective interventions.
  • Birth cohort effects and environmental factors are increasingly recognized as potential contributors to ALS.

Purpose of the Study:

  • To investigate the association between season of birth and the risk of developing Amyotrophic Lateral Sclerosis (ALS).
  • To explore potential early-life risk factors for ALS.
  • To examine the relationship between birth timing and ALS onset.

Main Methods:

  • Analysis of computerized death records from Swiss mortality statistics covering the period 1969-1993.
  • Statistical examination of birth dates for individuals diagnosed with ALS.
  • Comparison of birth season distributions between ALS patients and the general population.

Main Results:

  • A statistically significant excess of births was observed during the spring months (March, April, May) among individuals with ALS.
  • The findings suggest a potential seasonal pattern in ALS incidence.
  • This seasonal association points towards environmental exposures or factors acting early in life.

Conclusions:

  • The season of birth may be a relevant factor in Amyotrophic Lateral Sclerosis (ALS) etiology.
  • Risk factors for ALS could be acquired during prenatal or early postnatal periods.
  • The long latency between early-life exposures and ALS onset is a critical consideration for future research.

Keywords:
Correlation StudiesDemographic FactorsDeveloped CountriesDiseasesEuropePopulationPopulation DynamicsResearch MethodologyResearch ReportSeasonal VariationStatistical StudiesStudiesSwitzerlandWestern Europe

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