Degree of control of patients with chronic obstructive pulmonary disease in Spain: SINCON study.

The references used to measure the lung function allow some differences that, in many cases, exceed the efficacy outcomes obtained in clinical trials [ 20 ] Lung function has significant intra-patient variations, thus an isolated value may be mildly significant Even though there is a certain correlation between lung function and dyspnea or QoL, there is a significant dispersion of results It has not yet been proven that the available drugs slow the loss of lung function.

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