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Bronchodilator reversibility and airway hyperresponsiveness tests have limited utility in ruling out asthma. Despite their limitations, lung function tests remain central to the assessment and management of COPD. Their clinical value is limited by measurement variability and controversies regarding their interpretation. The current \u201ccombined assessment\u201d tool may have limited validity, particularly as treatment strategies have become increasingly standardised, emphasising early initiation of dual bronchodilators and avoidance of corticosteroids. Existing strategy documents remain subject to future revisions, as has occurred with previous versions. 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