TY - JOUR
T1 - Development and testing of the modified version of the Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ-M)
AU - Lareau, Suzanne C.
AU - Meek, Paula M.
AU - Roos, Philip J.
N1 - Your access to the NCBI website at www.ncbi.nlm.nih.gov has been temporarily blocked due to a possible misuse/abuse situation involving your site. This is not an indication of a security issue such as a virus or attack.
PY - 1998
Y1 - 1998
N2 - OBJECTIVE: Describe the process of development and testing to reduce the Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ) from 164 items to a modified questionnaire (the PFSDQ-M) consisting of 40 items. DESIGN: Instrument development and testing for reliability, validity, and practicality. SETTING: Hospital-based outpatients. PATIENTS: Testing was done on three groups of clinically stable patients with chronic obstructive pulmonary disease: a secondary analysis of 131 subjects for item selection, reliability, and validity; 50 additional subjects evaluating the PFSDQ-M for internal consistency, test-retest correlations, and construct validity; and 34 subjects from a longitudinal study for responsiveness. OUTCOME MEASURES: PFSDQ, PFSDQ-M, and spirometry. RESULTS: The practicality of the PFSDQ-M was supported by its sixth- to seventh-grade reading level, ease of reading (Flesch-Kincaid 69.5), self-administration, brief period for testing (7 minutes initially, 6 minutes on repeated testing), and limited missing data (< 8%). Reliability of the three components was supported by internal consistency α = 0.93 for change experienced by the patient with activities (CA), 0.95 for dyspnea with activities (DA), and 0.95 for fatigue with activities (FA). Good stability of the PFSDQ-M was demonstrated on test- retest; r = 0.70 for change, 0.83 for dyspnea, and 0.79 for fatigue (with activities). The usefulness of the PFSDQ-M in discriminating between dyspnea scores in patients based on their rate of deterioration in lung function was demonstrated. CONCLUSIONS: The PFSDQ was modified by reducing the number of activities evaluated, standardizing scaling formats, and adding a fatigue component. Findings suggest that the PFSDQ-M demonstrates initial reliability; good validity estimates, as seen with the factor analysis, and the dyspnea and activity scores appear responsive to physiologic changes in lung function over time.
AB - OBJECTIVE: Describe the process of development and testing to reduce the Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ) from 164 items to a modified questionnaire (the PFSDQ-M) consisting of 40 items. DESIGN: Instrument development and testing for reliability, validity, and practicality. SETTING: Hospital-based outpatients. PATIENTS: Testing was done on three groups of clinically stable patients with chronic obstructive pulmonary disease: a secondary analysis of 131 subjects for item selection, reliability, and validity; 50 additional subjects evaluating the PFSDQ-M for internal consistency, test-retest correlations, and construct validity; and 34 subjects from a longitudinal study for responsiveness. OUTCOME MEASURES: PFSDQ, PFSDQ-M, and spirometry. RESULTS: The practicality of the PFSDQ-M was supported by its sixth- to seventh-grade reading level, ease of reading (Flesch-Kincaid 69.5), self-administration, brief period for testing (7 minutes initially, 6 minutes on repeated testing), and limited missing data (< 8%). Reliability of the three components was supported by internal consistency α = 0.93 for change experienced by the patient with activities (CA), 0.95 for dyspnea with activities (DA), and 0.95 for fatigue with activities (FA). Good stability of the PFSDQ-M was demonstrated on test- retest; r = 0.70 for change, 0.83 for dyspnea, and 0.79 for fatigue (with activities). The usefulness of the PFSDQ-M in discriminating between dyspnea scores in patients based on their rate of deterioration in lung function was demonstrated. CONCLUSIONS: The PFSDQ was modified by reducing the number of activities evaluated, standardizing scaling formats, and adding a fatigue component. Findings suggest that the PFSDQ-M demonstrates initial reliability; good validity estimates, as seen with the factor analysis, and the dyspnea and activity scores appear responsive to physiologic changes in lung function over time.
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U2 - 10.1016/S0147-9563(98)90003-6
DO - 10.1016/S0147-9563(98)90003-6
M3 - Article
C2 - 9622402
SN - 0147-9563
VL - 27
SP - 159
EP - 168
JO - Heart and Lung: Journal of Critical Care
JF - Heart and Lung: Journal of Critical Care
IS - 3
ER -