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These findings suggest that TP can be used as a long-term add-on controller for patients with asthma receiving ICS.

Background: The percentage of the aged among all patients with bronchial asthma is increasing. Objective: To investigate the risk factors for the development of steroid-dependent asthma in the elderly. Methods: A multiple logistic regression analysis involving various clinical factors between steroid-dependent and -independent asthma was carried out for 59 asthmatics aged over 60 years, including 16 patients with steroid-dependent asthma. The calculated risk for each factor was compared with that obtained from 122 younger asthmatics aged 20–59 years. Results: Among the factors examined (sex, age, period from onset of asthma, type of asthma and family history of asthma, plus history of smoking, atopic dermatitis, allergic rhinitis, chronic sinusitis and nasal polyps), the significant risk factors for the development of steroid dependency in the elderly asthmatics were only family history of bronchial asthma (relative risk 3.6) and smoking history (relative risk 6.9). Conclusions: Some risk factors for steroid-dependent asthma in younger individuals were not significant in the elderly. Since the smoking history was most closely associated with the development of steroid dependency in the elderly, even though most of them had quit smoking, it is important for patients with asthma to avoid smoking.