1Young T, Palta M, Dempsey J, et al. The occurrence of sleep-disordered breathing among middle-aged adults[J]. N Engl J Med,1993,328:1230-1235.
2Zhong NS,Wang C, Yao WZ, et al. Prevalence of chronic obstructive pulmonary disease in China: a large, popula- tion-based survey[J]. Am J Respir Crit Care Med, 2007, 176:753-760.
3Chaouat A, Weitzenblum E, Krieger J, et al. Association of chronic obstructive pulmonary disease and sleep apnea syndrome[J]. Am Rev Respir Dis, 1995,151:82-86.
4Martinez MA,Soler JJ, Roman P. Sequential use of noc- turnal pulse oximetry and respiratory polygraphy(Auto- Set) for diagnosing sleep apnea/hypopnea syndrome in high risk patients[J]. Arch Bronconeumol, 2003,39 (2) : 74-80.
5Yamaya Y, Bogaard HJ, Wagner PD, et al. Validity of pulse oximetry during maximal exercise in normoxia, hy- poxia,and hyperoxia[J]. J Appl Physiol, 2002,92 (1) : 162-168.
6Stege G, Vos P J, van den Elshout F J, et al. Sleep, hypnotics and chronic obstructive pulmonary disease[J]. Respir Med,2008,102(6) :801-814.
7Agusti A, Hedner J, Marin J M, et al. Night time symptoms : a forgotten dimension of COPD[J]. Eur Re spir Rev, 2011,20 ( 121 ) : 183-194.
8Celli B R, MacNee W, ATS/ERS Task Force. Standards for the diagnosis and treatment of patients with COPD: a summary of the ATS/ERS position paper[J]. Eur Respir J,2004,23(6) :932-946.
9Zung W W. A rating instrument for anxiety disorders[J]. Psychosomatics, 1971,12 (6) : 371-379.
10Almagro P, Calbo E, Ochoa de Echagaen A, et al. Mor- tality after hospitalization for COPD[J]. Chest, 2002,121 (5):1441 -1448.