Probably not. Data from the ISOLDE study presented at the 1999 American Thoracic Society meeting did not indicate any predictive value of the response to oral corticosteroids with regard to subsequent benefit from ICS. No other studies have convincingly shown any predictive value from reversibility testing , and in general 'reversibility' is not a discriminatory feature, but rather a characteristic with no obvious cut-off point, varying independently of reversibility, e.g. bronchodilator reversibility .
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If you suffer with asthma, you will no doubt be familiar with the uncomfortable sensations as your bronchial tubes begin to narrow and your muscles around them start to tighten. A sticky mucus known as phlegm begins to produce and increase within your bronchial tubes and you begin to wheeze, cough and struggle to breathe.