Mean (SD) best annual FEV1 (% predicted) two years before, in the year of transition, and two years after the year of transition for the four subgroups of patients with cystic fibrosis colonised with Pseudomonas aeruginosa (PA)
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PA1 = first PA detection; PAc = chronic PA colonisation; PAm = first mucoid PA detection; PAcm = chronic mucoid PA colonisation.
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1-150 p<0.05.









