Development and testing of the Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ)

Area of Science:

• Pulmonary Medicine
• Clinical Assessment Tools
• Patient-Reported Outcomes

Background:

• Chronic obstructive pulmonary disease (COPD) significantly impacts patients' daily activities and quality of life.
• Quantifying dyspnea and functional limitations is crucial for effective pulmonary rehabilitation and management.
• Existing assessment tools may not comprehensively capture both dyspnea intensity and functional status changes.

Observation:

• The Pulmonary Functional Status and Dyspnea Questionnaire (PFSDQ) is a 164-item self-administered tool.
• It comprises two components: dyspnea intensity during activities and changes in functional ability across 79 daily activities.
• Activities are categorized into self-care, mobility, eating, home management, social, and recreational scales.

Findings:

• The PFSDQ demonstrated strong internal consistency reliability (0.91 for both components) and scale alpha coefficients (0.88–0.94).
• Content and initial construct validity were supported by clinical experts and theoretical relationships.
• Normative data were established, and a case study illustrated its clinical application.

Implications:

• The PFSDQ is a clinically and research-ready instrument for evaluating dyspnea and functional status in pulmonary disease patients.
• Its validated and reliable nature supports its use in assessing treatment efficacy and disease progression.
• Further research is recommended to expand its application and validation across diverse patient populations.