RT Journal Article SR Electronic T1 Laryngeal Measurements and Diagnostic Tools for Diagnosis of Chronic Obstructive Pulmonary Disease JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 49 OP 52 DO 10.1370/afm.1733 VO 13 IS 1 A1 Verónica Casado A1 Sandra M. Navarro A1 Andrés E. Alvarez A1 Mercedes Villafañe A1 Ana Miranda A1 Natalia Spaans A1 Representing the Research Group ParquEPOC YR 2015 UL http://www.annfammed.org/content/13/1/49.abstract AB PURPOSE The purpose of this study was to evaluate sensitivity, specificity, and positive and negative likelihood ratios of laryngeal height, lung function, and diagnostic questionnaires for screening and diagnosis of chronic obstructive pulmonary disease (COPD). METHODS We undertook a cross-sectional study of 233 people aged between 40 and 75 years. Measured variables were age, sex, weight, height, body mass index, tobacco use, maximum laryngeal height, and spirometry, and we administered a COPD questionnaire and the Lung Function Questionnaire. RESULTS For laryngeal height, we found a positive likelihood ratio of 5.21, and for the Lung Function Questionnaire, we found a negative likelihood ratio of 0.10. Combining a maximum laryngeal height of ≤4 cm with Lung Function Questionnaire findings of ≤18 yielded a positive likelihood ratio of 29.06, and a negative likelihood ratio of 0.26. CONCLUSIONS The intrinsic validity of the lung function questionnaire makes it useful for screening. Combining Lung Function Questionnaire results and laryngeal height can help confirm or dismiss COPD.