International Journal of COPD (Nov 2022)

Validation of the Spanish Activity Questionnaire in COPD (SAQ-COPD) in Patients with Chronic Obstructive Pulmonary Disease

  • Soler-Cataluña JJ,
  • Puente Maestu L,
  • Román Rodríguez M,
  • Esteban C,
  • Gea J,
  • Bernabeu Mora R,
  • Pleguezuelos Cobo E,
  • Ancochea J,
  • García-Río F

Journal volume & issue
Vol. Volume 17
pp. 2835 – 2846

Abstract

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Juan José Soler-Cataluña,1 Luis Puente Maestu,2 Miguel Román Rodríguez,3 Cristóbal Esteban,4 Joaquín Gea,5 Roberto Bernabeu Mora,6 Eulogio Pleguezuelos Cobo,7 Julio Ancochea,8 Francisco García-Río9 1Hospital Arnau de Vilanova, Valencia, Spain; 2Hospital Gregorio Marañón, Madrid, Spain; 3Centro de Salud Son Pisà, Palma de Mallorca, Spain; 4Hospital de Galdakao, Bilbao (Vizcaya), Spain; 5Hospital del Mar, Barcelona, Spain; 6Hospital General Universitario Morales Meseguer, Murcia, Spain; 7Hospital de Mataró, Mataró (Barcelona), Spain; 8Hospital de La Princesa, Madrid, Spain; 9Hospital La Paz-IdiPAZ, Madrid, SpainCorrespondence: Francisco García-Río, Hospital La Paz, P.° de la Castellana, 261, Madrid, 28046, Spain, Tel +34 917 27 70 00, Email [email protected]: 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.Keywords: physical activity, chronic obstructive pulmonary disease, SAQ-COPD, validity, reliability

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