Table 3. Relationship between the spheres created from the Chronic Obstructive Pulmonary Disease Assessment Test with the spheres of the St George Respiratory Questionnaire. Castellón de la Plana, Comunidad Valenciana, Spain, 2014, 2015, 2016.

	Correlation
CAT* symptoms	0.444‡
SGRQ* symptoms
CAT* activity	0.591‡
SGRQ* activity
CAT* impact	0.637‡
SGRQ* impact
Total CAT*	0.628‡
SGRQ† total
	Cronbach's Alpha
Total CAT*	0.799
SGRQ† total	0.843

^*CAT = Chronic Obstructive Pulmonary Diseases Assessment Test;

^†SGRQ = St George Respiratory Questionnaire;

^‡Spheres showing correlation p < 0.01