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Sample size calculations were based on the rate of FEV1 change. Table 2 shows the number of patients needed to detect a 2–10 mL/year difference in the rates of change of FEV1 in patients on an ICS and not on an ICS.
Sample size needed to detect a difference in rates of change of FEV1 between ICS and non-ICS groups of patients
Abbreviation: ICS, inhaled corticosteroids.
Copyright and License information: ©2019 Whittaker et al.
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