Illness perception in people with chronic obstructive pulmonary disease

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Abstract
Illness perception (IP) concerns how patients evaluate living with a disease. To get a broader understanding of IP in patients with chronic obstructive pulmonary disease (COPD), we investigated whether breathlessness is an important precursor of IP and whether IP in its turn is related to mental health, physical health and global quality of life (QOL). One hundred and fifty‐four patients with COPD participated in a cross‐sectional survey. Participants underwent pulmonary function testing, provided socio‐demographic and clinical information, and completed the following standardized instruments: Brief Illness Perception Questionnaire, Respiratory Quality of Life Questionnaire, Short‐Form 12 Health Survey and the Quality of Life Scale. Multiple regression analyses were performed. A high IP score indicates that a patient believes that his/her illness represents a threat. Participants with a high score on the IP dimensions consequences, identity, concern and emotional representation, experienced more breathlessness. High scores on the IP dimensions consequences, identity and concern were associated with impaired physical health and high scores on the IP dimensions consequences, identity and emotional representation were associated with impaired mental health. Impaired global QOL was associated with high scores on the IP dimensions consequences, identity, concern, coherence and emotional representation. The strength of the associations between breathlessness and physical/mental health and global QOL decreased when certain dimensions of IP were included as predictors, indicating that IP to some extent acts as a mediating factor. These findings may have practical implications of patient counselling by helping COPD patients to cope with their disease by restructuring their personal models of illness.

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