Seattle Obstructive Lung Disease Questionnaire: sensitivity to outcomes in pulmonary rehabilitation in severe pulmonary illness

Basia Belza, Bonnie G Steele, Kevin Cain, Jeff Coppersmith, JoEllen Howard, Sambasiva Lakshminarayan
Journal of Cardiopulmonary Rehabilitation 2005, 25 (2): 107-14

PURPOSE: To evaluate the ability of the Seattle Obstructive Lung Disease Questionnaire (SOLDQ) to detect change in health-related quality of life (HRQOL) following a pulmonary rehabilitation program (PRP) and to determine associations with other functional indicators.

METHODS: A prospective pre- and post-test design. A PRP was offered for 60 minutes, 2 times per week for 8 weeks. Measured at entry and exit to the PRP: the SOLDQ (physical, emotional, and coping skills), 6-minute walk, Medical Outcomes Study Short Form Health Survey-36 Veterans (SF-36V) (physical and mental), Lareau Functional Status and Dyspnea Questionnaire, and the Multidimensional Assessment of Fatigue (MAF) scale. Setting was an outpatient PRP in a VA Medical Center.

RESULTS: Participants included 58 adults who completed the PRP (age mean = 66, SD +/- 9.8; FEV1% predicted mean = 39, SD +/- 15.9). At baseline, significant correlations were found between SOLDQ physical functioning and SF-36V physical, dyspnea, fatigue, 6-minute walk distance, SF-36V mental, and spirometry. SOLDQ emotional functioning significantly correlated with fatigue, dyspnea, and SF-36V mental and physical. SOLDQ coping skills significantly correlated with fatigue, dyspnea, and SF-36V mental and physical. Paired, 2-tailed, t tests comparing the SOLDQ subscales pre- and post-program were significant, with the biggest treatment effect seen with emotional functioning. Other measures showing significant improvement included 6-minute walk, SF-36V physical, dyspnea, and fatigue.

CONCLUSIONS: After participation in a PRP, all 3 SOLDQ subscales improved significantly and were associated with other indicators of function. These findings validate the SOLDQ as a measure sensitive to functional changes associated with participation in pulmonary rehabilitation.

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