Abstract：
BACKGROUND:Limited data are available as to the relationship between computed tomography (CT) derived data on emphysema and airway wall thickness, and quality of life in subjects with chronic obstructive pulmonary disease (COPD). Such data may work to clarify the clinical correlate of the CT findings. METHODS:We included 1778 COPD subjects aged 40-75 years with a smoking history of at least 10 pack-years. They were examined with St George's Respiratory Questionnaire (SGRQ-C) and high-resolution chest CT. Level of emphysema was assessed as percent low-attenuation areas less than -950 Hounsfield units (%LAA). Airway wall thickness was estimated by calculating the square root of wall area of an imaginary airway with an internal perimeter of 10 mm (Pi10). RESULTS:In both men and women, the mean total score and most of the subscores of SGRQ-C increased with increasing level of emphysema and increasing level of airway wall thickness, after adjusting for age, smoking status, pack years, body mass index and FEV1. The highest gradient was seen in the relationship between the activity score and the emphysema level. The activity score increased by 35% from the lowest to the highest emphysema tertile. The relationship between level of emphysema and the total SGRQ-C score became weaker with increasing GOLD (Global initiative for Chronic Obstructive Lung Disease) stages (p < 0.001), while the impact of gender was limited. CONCLUSION:In subjects with COPD, increasing levels of emphysema and airway wall thickness are independently related to impaired quality of life.
journal_name
Respir Medjournal_title
Respiratory medicineauthors
Gietema HA,Edwards LD,Coxson HO,Bakke PS,ECLIPSE Investigators.doi
10.1016/j.rmed.2013.04.016subject
Has Abstractpub_date
2013-08-01 00:00:00pages
1201-9issue
8eissn
0954-6111issn
1532-3064pii
S0954-6111(13)00166-2journal_volume
107pub_type
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