Disease knowledge level is a noteworthy risk factor of anxiety and depression in patients with chronic obstructive pulmonary disease: a cross-sectional study

Table 2 Correlation between HAD total score and subject characteristics

	Spearman’s rho	Pvalue	Partial correlations	Pvalue
Age	−0.122	0.021	−0.036	0.509
Gender^†	0.295	0.000	0.376	<0.001
Pack-year history	−0.029	0.586	0.051	0.344
Duration of COPD	0.014	0.799	−0.043	0.419
CAT	0.495	0.000	0.351	<0.001
mMRC	0.309	0.000	0.109	0.042
BCKQ	−0.217	0.000	−0.153	0.004
FEV1 (L)	−0.157	0.003	−0.063	0.243
FEV1% predict	−0.174	0.001	0.043	0.425
PostFEV1 (L)	−0.145	0.006	0.070	0.194
PostFEV1% predict	−0.158	0.003	−0.051	0.341
6MWT	−0.112	0.034	0.014	0.789

Abbreviations: CAT COPD Assessment Test, mMRC modified Medical Research Council, BCKQ Bristol COPD Knowledge Questionnaire, HAD Hospital Anxiety and Depressive Scale, FEV1 Forced Expiratory Volume in 1 Second, postFEV1 post-bronchodilator FEV1, 6MWD Six-Minute Walking Distance Test.
^†Set “male” = 0, “female” = 1.

ISSN: 1471-2466