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. 2015 Apr 13;10:745–757. doi: 10.2147/COPD.S77586

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© 2015 Nagai et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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The changes in the total and three component scores of the SGRQ during follow-up.

Notes: Annual changes in the total score of SGRQ from baseline classified by annual change in FEV₁ (ml/year) during follow-up; The change from baseline in the SGRQ total score (mean ΔSGRQ ± SE) at 4-year follow-up: ΔSGRQ in rapid FEV₁ decliners, 5±2; slow FEV₁ decliners, 0±1, or FEV₁ sustainers, −4±2, and at 5-year follow-up: ΔSGRQ in rapid FEV₁ decliners, 5±2; slow FEV₁ decliners, 0±1; or FEV1 sustainers, −4±2 (A). Annual changes in the activity scores (B), symptom scores (C), and impact scores (D) of the SGRQ classified by annual change in postbronchodilator FEV₁ (ml/year) during follow-up are shown. P-values represent one-way analysis of variance with post hoc comparisons using Tukey’s multiple comparison tests at each year.

Abbreviations: FEV₁, forced expiratory volume in 1 second; SGRQ, St George’s Respiratory Questionnaire; ΔSGRQ, change from baseline in the SGRQ; SE, standard error.