Treatment for mild asthma leads to improved lun...( A study by the Woolcock Institute of...),Health

A study by the Woolcock Institute of Medical Research in Sydney is the first to demonstrate that in patients with very mild or well-controlled asthma, regular treatment with low dose ICS leads to significantly better dayto-day lung function.

The study published in this months edition of Primary Care Respiratory Journal was conducted over an 11 month period, and compared the effects of inhaled corticosteroids (ICS) and placebo on asthma control in mild asthmatics.

The results of the study raise questions about the current emphasis in asthma treatment which is based largely on controlling symptoms, and which does not advocate ICS treatment for patients with symptoms two days a week or less.

Results showed significant and clinically important treatment benefits on markers such as lung function, airway hyperresponsiveness and exhaled nitric oxide, which are all predictors of the risk of future adverse outcomes such as exacerbations.

Results indicated that a ceiling effect for lung function, often assumed to prevail in mild asthma, does not exist. Even patients whose lung function is over 90% of predicted normal value may have room to further improve their personal best with treatment.

The study also demonstrated subjects receiving placebo were nearly three times more likely to experience a mild exacerbation.

In recent years the emphasis in asthma treatment has been on how well a patients symptoms are is controlled, says Woolcock research leader Assoc. Prof. Helen Reddel.

The patients in this study had asthma that was so mild, with symptoms once a week or less, that they themselves didnt see any benefit in regular preventer treatment, she said.

However for those participants receiving ICS during the study, their lung function was better, they had less airway inflammation and less airway twitchiness. All of these things are predictors of reduction in risk of future adverse outcomes