Chest
Volume 137, Issue 6, June 2010, Pages 1324-1331
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ORIGINAL RESEARCH
ASTHMA
Psychologic Distress and Maladaptive Coping Styles in Patients With Severe vs Moderate Asthma

https://doi.org/10.1378/chest.09-1979Get rights and content

Background

Though several biologic factors have been suggested to play a role in the development and persistence of severe asthma, those associated with psychologic factors remain poorly understood. This study assessed levels of psychologic distress and a range of disease-relevant emotional and behavioral coping styles in patients with severe vs moderate asthma.

Methods

Eighty-four patients (50% women, mean [M] age 46 years) with severe (n = 42) and moderate (n = 42) asthma were recruited. Severe asthma was defined according to American Thoracic Society criteria. Patients underwent demographic and medical history interviews and pulmonary function and allergy testing. Patients also completed questionnaires measuring asthma symptoms and the Millon Behavioral Medicine Diagnostic Inventory, which assesses psychologic distress and emotional/behavioral coping factors that influence disease progression and treatment.

Results

After adjustment for covariates and applying a correction factor that reduced the significant P level to < .01, patients with severe vs moderate asthma reported experiencing more psychologic distress, including worse cognitive dysfunction (F = 6.72, P < .01) and marginally worse anxiety-tension (F = 4.02, P < .05). They also reported worse emotional coping (higher illness apprehension [F = 9.57, P < .01], pain sensitivity [F = 10.65, P < .01], future pessimism [F= 8.53, P < .01], and interventional fragility [F = 7.18, P < .01]), and marginally worse behavioral coping (more functional deficits [F = 5.48, P < .05] and problematic compliance [F = 4.32, P < .05]).

Conclusions

Patients with severe asthma have more psychologic distress and difficulty coping with their disease, both emotionally and behaviorally, relative to patients with moderate asthma. Future treatment studies should focus on helping patients with severe asthma manage distress and cope more effectively with their illness, which may improve outcomes in these high-risk patients.

Section snippets

Study Participants

In total, 84 patients with documented, persistent, severe (n = 42) or moderate (n = 42) asthma were recruited through physician referrals from two tertiary care outpatient asthma clinics. Severe asthma was defined based on having received adequate therapy and verified treatment adherence, with patients meeting American Thoracic Society19 major and minor criteria for severe asthma.

A comparison group of patients with moderate asthma was recruited from the same centers, and the groups were matched

Sociodemographic, Clinical, and Asthma Characteristics

Comparisons of sociodemographic and clinical characteristics across the two groups are shown in Table 1. Not unexpectedly, patients in the severe asthma group had worse FEV1 (percent predicted) than patients in the moderate group. There were no other significant differences. As seen in Table 2, patients with severe asthma had higher levels of eosinophils (%) than patients with moderate asthma, but not neutrophils and lymphocytes. Patients with severe vs moderate asthma had greater health

Discussion

Results of the attitudinal/emotional coping subscale analyses reveal that patients with severe vs moderate asthma are more likely to negatively anticipate symptoms and medical interventions (illness apprehension, future pessimism) and are more likely to be hypersensitive to disease-related interventions or procedures (interventional fragility). We are not aware of any studies of patients with asthma assessing these particular coping styles. However, these results are in line with those of

Acknowledgments

Author contributions: Dr Lavoie: contributed to analyzing the data and writing the manuscript.

Dr Bouthillier: contributed to overseeing the administration and scoring of the Millon Behavioral Medicine Diagnostic Inventory, for analyzing the data, and for manuscript editing.

Dr Bacon: contributed to analyzing the data and manuscript editing.

Dr Lemière: contributed to the study design, patient recruitment, and manuscript editing.

Dr Martin: contributed to the study design, patient recruitment, and

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    Funding/Support: Funding support for this study was provided by the Fonds de la recherche en santé du Québec (Drs Lavoie and Bacon) and the Richard and Edith Strauss Canada Foundation.

    Reproduction of this article is prohibited without written permission from the American College of Chest Physicians (www.chestpubs.org/site/misc/reprints.xhtml).

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