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. 2020 Jan 21;15:157–166. doi: 10.2147/COPD.S225543

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© 2020 Zimmermann et al.

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Relationships at baseline between FOT parameters with SGRQ for (A) mean reactance (expressed as absolute values), (B) index of expiratory flow limitation (expressed as absolute values), (C) forced vital capacity (expressed as z-scores) and (D) mean resistance (expressed as absolute values). (n = 12; missing SGRQ data in 3 subjects).

Abbreviations: X_mean, mean reactance; FVC, forced vital capacity; DeltaXrs, index of expiratory flow limitation as measured by FOT; R_mean, mean resistance; SGRQ, St. George’s Respiratory Questionnaire total score.