Key result
CDQ yields ~73% diagnostic accuracy for detecting COPD versus spirometry.
Why the study?
High rates of underdiagnosed COPD in the Philippines highlight the need to evaluate whether the COPD Diagnostic Questionnaire can accurately pre-select at-risk patients for spirometry.
Does the COPD Diagnostic Questionnaire (CDQ) accurately detect COPD in at-risk Filipino patients compared to spirometry?
Cross-Sectional (n=126)
No
Does the COPD Diagnostic Questionnaire (CDQ) accurately detect COPD in at-risk Filipino patients compared to spirometry?
Effect estimate: AUC 0.8309
The COPD Diagnostic Questionnaire (CDQ) demonstrates acceptable discriminative ability and high negative predictive value, making it a viable screening tool for COPD in low-resource settings prior to spirometry.
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May support symptom-based COPD screening in primary care; leaves open prospective validation before clinical use.
Cruz et al. (2026) conducted a cross-sectional in Chronic Obstructive Pulmonary Disease (COPD) (n=126). COPD Diagnostic Questionnaire (CDQ) vs. Spirometry was evaluated on Validity of CDQ in terms of accuracy as a diagnostic tool for detection of COPD (AUC 0.8309). The COPD Diagnostic Questionnaire (CDQ) demonstrated good discriminatory ability for detecting COPD (AUC 0.8309), with a cutoff >19.5 yielding 73.01% diagnostic accuracy compared to spirometry.
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