Characteristics of Clinical Asthma Types in Elderly Patients with Bronchial Asthma

Yoshiro Tanizaki, Hikaru Kitani, Morihiro Okazaki, Takashi Mifune, Fumihiro Mitsunobu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Asthma was classified into four types, Ia-1 (bronchospasm with 0—49 ml/day of expectoration), Ia-2 (with 5—99 ml/day), lb (over 100 ml/day) and II (bronchiolar obstruction), according to clinical symptoms. Characteristics of airway responses in each clinical asthma type were compared between 25 elderly (mean age, 65.2 years) and 30 younger subjects (mean age, 44.9 years) with bronchial asthma, by observing ventilatory function and cellular composition in bronchoalveolar lavage (BAL) fluid. 1. In patients with types la-2 and Ib, the %V25 value was significantly lower in the elderly subjects than in the younger subjects. 2. Comparing the values of ventilatory parameters of type Ia-1 cases with other asthma types, %V25value was lower in other asthma types than in type Ia-1 in the elderly. All ventilatory parameters examined were generally lower in type II cases than in other asthma types in the elderly, but this difference was not significant. In contract, in the younger subjects, the values of %MMF, %V50and %V25were significantly lower in type II cases than in other asthma types. 3. The proportion of neutrophils in bronchoalveolar lavage (BAL) fluid was higher in the younger patients with type II than in the elderly patients with the same type, although there was no significant difference between older and younger subjects. The proportion of BAL eosinophils in patients with type lb was significantly higher in younger subjects than in elderly subjects. These results indicate that airway responses which are characteristic of each asthma type are stronger in younger patients than in elderly patients.

Original languageEnglish
Pages (from-to)116-122
Number of pages7
JournalNippon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics
Issue number2
Publication statusPublished - 1993


  • Airway inflammatory cells
  • Asthma in the elderly
  • Clinical asthma type
  • Ventilatory function

ASJC Scopus subject areas

  • Geriatrics and Gerontology


Dive into the research topics of 'Characteristics of Clinical Asthma Types in Elderly Patients with Bronchial Asthma'. Together they form a unique fingerprint.

Cite this