Quality of Sleep in COPD Patients
Research has shown an association between impairment of sleep quality
associated with COPD disease progression as measured both by the PSQI and
the GOLD classification system. However, the results of this study highlighted
an average PSQI score (9.49; SD = 3.6) greater than that of other similar
studies (Hynninen et al., 2007; Nunes et al., 2009). The explanation for
this difference could be because the sample presented a higher average
FEV1/predicted score (59.32; SD = 20.59), and, therefore, an index of disease
severity higher than that of the subjects of other studies.