1. Global Initiative for Chronic Obstructive Lung Disease, GOLD 2017 Global Strategy for the Diagnosis, Management and Prevention of COPD, GOLD, Barcelona, January 2017; http://goldcopd.org; last access date September 29, 2017.
2. World Health Organization, Global Health Estimates 2015: Deaths by Cause, Age, Sex, by Country and by Region, 2000-2015, WHO, Geneva 2016; http://www.who.int/entity/healthinfo/global_burden_disease/GHE2015_Deaths_Global_2000_2015.xls?ua=1; last access date November 6, 2017.
3. R. D. Restrepo, M. T. Alvarez, L. D. Wittnebel, H. Sorenson, R. Wettstein, D. L. Vines, J. Sikkema-Ortiz, D. D. Gardner and R. L. Wilkins, Medication adherence issues in patients treated for COPD, Int. J. Chron. Obstruct. Pulmon. Dis. 3 (2008) 371−384; https://doi.org/10.2147/COPD.S3036.10.2147/COPD.S3036
5. The American Thoracic Society, St. George’s Respiratory Questionnaire (SGRQ), New York, June 2016; http://www.thoracic.org/members/assemblies/assemblies/srn/questionaires/sgrq.php; last access date September 29, 2017.
7. M. Krousel-Wood, T. Islam, L. S. Webber, R. N. Re, D. E. Morisky and P. Muntner, New medication adherence scale versus pharmacy fill rates in seniors with hypertension, Am. J. Manag. Care 15 (2009) 59−66.
9. F. Arpinelli, M. Carone, G. Riccardo and G. Bertolotti, Health-related quality of life measurement in asthma and chronic obstructive pulmonary disease: review of the 2009-2014 literature, Multidiscip. Respir. Med. 11 (2016) Article ID 5 (7 pages); https://doi.org/10.1186/s40248-016-0040-9.10.1186/s40248-016-0040-9
11. M. Ferrer, C. Villasante, J. Alonso, V. Sobradillo, R. Gabriel, G. Vilagut, J. F. Masa, J. L. Viejo, C. A. Jimenez-Ruiz and M. Miravitlles, Interpretation of quality of life scores from the St George’s respiratory questionnaire, Eur. Respir. J. 19 (2002) 405−413; https://doi.org/10.1183/09031936.02.0021320210.1183/09031936.02.00213202
12. M. Miravitlles, M. Ferrer, A. Pont, R. Zalacain, J. L. Alvarez-Sala, F. Masa, H. Verea, C. Murio, F. Ros and R. Vidal, Effect of exacerbations on quality of life in patients with chronic obstructive pulmonary disease: a 2 year follow up study, Thorax 59 (2004) 387−395; https://doi.org/10.1136/thx.2003.008730.10.1136/thx.2003.008730
13. M. Miravitlles, J. B. Soriano, F. Garcia-Rio, L. Munoz, E. Duran-Tauleria, G. Sanchez, V. Sobradillo and J. Ancochea, Prevalence of COPD in Spain: impact of undiagnosed COPD on quality of life and daily life activities, Thorax 64 (2009) 863−868; https://doi.org/10.1136/thx.2009.115725.10.1136/thx.2009.115725
14. J. G. van Manen, P. J. Bindels, F. W. Dekker, B. J. Bottema, J. S. van der Zee, C. J. Ijzermans and E. Schade, The influence of COPD on health-related quality of life independent of the influence of comorbidity, J. Clin. Epidemiol. 56 (2003) 1177−1184; https://doi.org/10.1016/S0895-4356(03)00208-7.10.1016/S0895-4356(03)00208-7
15. M. R. Boland, J. F. van Boven, A. L. Kruis, N. H. Chavannes, T. van der Molen, L. M. Goossens and M. P. Rutten-van Molken, Investigating the association between medication adherence and health-related quality of life in COPD: Methodological challenges when using a proxy measure of adherence, Respir. Med. 110 (2016) 34−45; https://doi.org/10.1016/j.rmed.2015.11.008.10.1016/j.rmed.2015.11.00826639189