2Schlecht NF, Schwartzman K, Boubeau J. Dyspnea as clinical in- dicator in patients with chronic obstructive pulmonary disease[ J ]. Chron ResPir Dis, 2005, 2(4) : 183 - 191.
3Niewoehner DE. The impact of severe exacerbation on quality of life and the clinical course of chronic obstructive pulmonarydisease [J].Am J Me<l, 2006, 119(10):38- 45.
4Tze- Pin Ng, Mathew Niti, Wang -Chen Tan, et al. Depressive SymPtoms and Chronic Obstructive pulmonary Disease [ J ]. arch Intern Med, 2007, 67:60 - 67.
5Dela Fuente Cid R, de la Iglesia Martinez F, Ramos polledo V, et al. Factocranalysis of the Health related quality of life ot patients with stable chronic obstructive pulmonary disease[J ]. Arch Bron coneumol, 2001, 37 (10) : 411 - 16.
6BoniE, Corda L, Franchini D, et al. Volumc effect and exertional dyspnoea after Bronchodilator in COPD Patients with and without expiratory flow limitation at rest [ J ]. Thorax, 2002, 57 : 528 - 532.
9Hajito T, Nishimura K, tsukino M, et al. Analysis of clinical meth- ods used to evaluate dyspnea in patients with chronic obstructive pullnonary disease [ J ]. Am J Respir Crit Care Med, 1998, 158 : 1 185 - 1 189.
9Rabe KF, Hurd S, Anzueto A, et al. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease: GOLD executive summary. Am J Respir Crit Care Med, 2007, 176: 532-555.
10Hu J, Meek P. Health-related quality of life in individuals with chronic obstructive pulmonary disease. Heart Lung, 2005, 34: 415-422.
