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.