The influence of COPD on health-related quality of life independent of the influence of comorbidity

• Published in: Journal of clinical epidemiology Vol. 56; no. 12; pp. 1177 - 1184
• Main Authors: van Manen, Jeannette G, Bindels, Patrick J.E, Dekker, Friedo W, Bottema, Bernardus J.A.M, van der Zee, Jaring S, Ijzermans, C.Joris, Schadé, Egbert
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.12.2003; Elsevier; Elsevier Limited
• Subjects: Aged; Biological and medical sciences; Chronic Disease; Chronic illnesses; Chronic obstructive pulmonary disease; Chronic obstructive pulmonary disease, asthma; Comorbidity; COPD; Emphysema; Epidemiology; Female; General practice; Humans; Male; Medical sciences; Middle Aged; Patient Participation; Pneumology; Pulmonary Disease, Chronic Obstructive - psychology; Quality of Life; Sensitivity and Specificity; Statistics, Nonparametric; Studies; Surveys and Questionnaires; General practice; Comorbidity; COPD; Quality of life; Human; Lung disease; Concomitant disease; Prognosis; Respiratory disease; Bronchus disease; Obstructive pulmonary disease
• ISSN: 0895-4356; 1878-5921
• DOI: 10.1016/S0895-4356(03)00208-7

The goal of this study was to determine the influence of chronic obstructive pulmonary disease (COPD) on health-related quality of life (HRQL) independent of comorbidity. Patients with COPD in general practice, ⩾40 years, were selected. To recruit controls, a random sample of persons without COPD and ⩾40 years, was taken. HRQL was assessed with the SF-36 and comorbidity was determined by questionnaire. The influence of COPD on HRQL independent of comorbidity (represented by adjusted regression coefficients) was significant for physical functioning (−27.6), role functioning due to physical problems (−21.6), vitality (−14.4), and general health (−25.7), and was minor and not significant for social functioning (−5.6), mental health (−1.3), role functioning due to emotional problems (−2.7), and bodily pain (−2.5). Comorbidity contributed significantly to the HRQL of all domains (−7.6 to −27.1). COPD patients can be impaired in all domains of HRQL. However, impairments in physical functioning, vitality, and general health are related to COPD and to some extent to comorbidity, while impairments in social and emotional functioning do not seem to be related to COPD, but only to comorbidity.