Soler-Cataluña, Juan JoséPuente Maestu, LuisRoman-Rodriguez, MiguelEsteban, CristobalGea, JoaquínBernabeu Mora, RobertoPleguezuelos Cobo, EulogioAncochea, JulioGarcía-Río, Francisco2024-10-042024-10-042022Soler-Cataluña JJ, Puente Maestu L, Román Rodríguez M, Esteban C, Gea J, Bernabeu Mora R, et al. Validation of the Spanish Activity Questionnaire in COPD (SAQ-COPD) in Patients with Chronic Obstructive Pulmonary Disease. Int J Chron Obstruct Pulmon Dis. 2022 Nov;Volume 17:2835-46http://hdl.handle.net/20.500.13003/18649https://hdl.handle.net/20.500.12105/23557Purpose: The Spanish Activity Questionnaire in COPD (SAQ-COPD) is a short, simple physical activity (PA) measurement instrument for patients with chronic obstructive pulmonary disease (COPD). In this study, we analyzed its validity and sensitivity to change. Methods: Prospective scale validation study. An accelerometer (DynaPort MoveMonitor®) and the Yale Physical Activity Survey (YPAS) were used as reference standards. The analyses examined the criterion validity (Spearman correlations), internal consistency (Cronbach's alpha), factorial structure, test-retest reliability (intraclass correlation coefficient, ICC), sensitivity to change and receiver operating characteristic (ROC) curve to classify patients with low PA. Results: A total of 300 patients diagnosed with COPD were analyzed (73% males, mean age 66 ± 8 years, 40.3% with severe airflow limitation). Cronbach's alpha was 0.60 and Spearman's correlations with accelerometer measurements of PA [number of steps, metabolic equivalents (MET), physical activity level (PAL)] and YPAS ranged from 0.37 to 0.53 (all p < 0.001). ICC was 0.69 (95% CI 0.61-0.74) and the area under the ROC curve to identify low PA was 0.65 (95% confidence interval: 0.58-0.73). Significant variations in SAQ-COPD scores were found between groups defined by YPAS for change. Conclusion: The SAQ-COPD questionnaire is a valid instrument for classifying PA in patients with COPD. Correlations with other instruments provide criterion validity and also demonstrate good sensitivity to change.enghttp://creativecommons.org/licenses/by-nc/4.0/AsthmaMaleAgedProspective StudiesFemalePulmonary Disease, Chronic ObstructiveHumansMiddle AgedPsychometricsReproducibility of ResultsSurveys and Questionnairesresearch articleAtribution-NonComercial 4.0 International3638199517283510.2147/COPD.S3814271178-2005International journal of chronic obstructive pulmonary diseaseopen accessEnfermedad Pulmonar Obstructiva CrónicaHumanosPersona de Mediana EdadReproducibilidad de los ResultadosEstudios ProspectivosAsmaAncianoFemeninoEncuestas y CuestionariosPsicometríaMasculino2-s2.0-85141348954885320500001L2018445668