Cardiorespiratory coupling is associated with exercise capacity in patients with chronic obstructive pulmonary disease

Table 5 Multivariable regression model for distance saturation product (DSP) as assessed by 6MWT

variable	Beta	SE	t value	p-value
Age, year	− 2.8	1.1	− 2.4	0.02
Synchrogram Index	89.1	39.0	2.3	0.03
CAT score	− 0.9	1.6	− 0.6	0.57
mMRC	− 40.7	14.3	− 2.8	0.007
Presence of emphysema	− 41.1	19.6	− 2.1	0.04

Presence of emphysema was defined as presence of emphysema in the high-resolution computed tomography
r² = 0.63, adjusted r² = 0.58, residual stand error = 56.3, p < 0.0001
DSP Distance saturation product, SE stand error of beta
The fitted model is DSP = 619.2 + 89.1(Synchrogram Index) − 2.8Age − 50.7mMRC − 41.1Emphysema

ISSN: 1471-2466