25 , 30 One question, “dyspnoea,” was added temporarily to MASK‐air ® but the results showed a highly significant correlation with VAS ‘asthma’ in patients with severe asthma (rho = 0.93 and 0.90). 31 , 32 The question was therefore subsequently deleted.
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Concurrent validity, cut-offs and ability to change of patient-reported outcome measures for rhinitis and asthma in MASK-air<sup>®</sup>.
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