Are high barometric pressure, low humidity and diurnal change of temperature related to the onset of asthmatic symptoms?

Pediatr Int. 2000 Jun;42(3):272-4. doi: 10.1046/j.1442-200x.2000.01228.x.


Background: Meteorologic factors play a role in the expression of asthmatic symptoms; however, there are controversies about the causal relationship between meteorologic factors and asthma. The relationship between meteorologic parameters and emergency admissions for asthmatic symptoms in this hospital were analyzed.

Methods: A total of 205 patients (130 boys and 75 girls, 0.1-16.6 years of age) who were admitted to Hakodate Chuo General Hospital for asthmatic symptoms between 1 January and 31 December 1997 were submitted to our study. We divided a total of 365 days into two groups of days with and without any admissions. Meteorologic factors for the days with admissions and 1-3 days before hospitalization were compared with those of the days of no admissions. Statistical analysis was done with the Mann-Whitney U-test.

Results: On the days with admissions and 1 day before hospitalizations, barometric pressure was higher and relative humidity lower than on days with no admissions. The diurnal difference between maximum and minimum temperature for days 1 day before days with admissions was larger than that for 1 day before days with no admissions.

Conclusions: It is thought that change in barometric pressure, relative humidity and temperature had some influence on the worsening of asthmatic symptoms.

MeSH terms

  • Asthma / etiology*
  • Atmospheric Pressure*
  • Child
  • Child, Preschool
  • Female
  • Hospitalization
  • Humans
  • Humidity / adverse effects*
  • Infant
  • Infant, Newborn
  • Male
  • Periodicity
  • Statistics, Nonparametric
  • Temperature*