TABLE 3

Correlations between Multidimensional Dyspnea Profile immediate^# perception domain (S) and emotional response domain (A2) scores and measures of handicap and quality of life

	Patients n	Immediate^# perception domain (S) ρ	Emotional response domain (A2) ρ	p-value^¶
No adjustment
CAT score	159	0.77	0.63	0.001
DIRECT score	161	0.70	0.58	0.019
SF-12 PCS score	154	−0.50	−0.41	0.149
SF-12 MCS score	154	−0.43	−0.60	0.005
Adjustment for FEV₁ and mMRC
CAT score	133	0.61	0.49	0.095
DIRECT score	135	0.40	0.33	0.409
SF-12 PCS score	130	−0.16	−0.13	0.747
SF-12 MCS score	130	−0.25	−0.51	0.001

CAT: COPD Assessment Test; DIRECT: Disability Related to COPD Tool; SF-12: 12-item Short-Form Health Survey; PCS: physical composite scale; MCS: mental composite scale; FEV₁: forced expiratory volume in 1 s; mMRC: modified Medical Research Council dyspnoea scale. ^#: the term “immediate” corresponds to the perceptions evoked by the “worst dyspnoeic event” focused on by the patients, irrespective of the moment at which this event occurred within the 15 days’ recall period; ^¶: Hotelling–Williams test comparing correlation coefficients, in bold when p<0.05.