Table 3.

Linear regression analyses exploring the associations of “low-intensity movement,” “high-intensity movement,” and “sleep” components with participant characteristics for COPD and control groups

Variables	COPD						Controls
	Low-intensity movement		High-intensity movement		Sleep		Low-intensity movement		High-intensity movement		Sleep
	R	P-value	R	P-value	R	P-value	R	P-value	R	P-value	R	P-value
Demographics
Age	−0.067	0.490	−0.393	<0.001	0.061	0.529	−0.044	0.611	−0.348	<0.001	−0.190	0.028
Gendera	−0.143	0.138	−0.096	0.319	−0.267	0.005	−0.094	0.279	−0.070	0.420	−0.254	0.003
Respiratory health
mMRC score	−0.348	<0.001	−0.105	0.278	0.206	0.032	−0.219	0.012	−0.104	0.235	0.090	0.304
FEV1	−0.187	0.332	−0.008	0.065	−0.293	0.002	−0.080	0.356	0.089	0.308	−0.055	0.530
Perceived general health
Mobilityb	−0.250	0.009	−0.133	0.168	0.142	0.141	−0.046	0.601	−0.120	0.169	−0.038	0.665
Self-careb	−0.150	0.120	−0.201	0.036	0.061	0.528	0.064	0.465	−0.096	0.270	−0.069	0.431
Activitiesb	−0.218	0.024	−0.173	0.074	0.185	0.057	−0.013	0.883	−0.109	0.215	−0.166	0.058
Painb	−0.149	0.121	−0.124	0.200	0.111	0.250	0.031	0.720	−0.202	0.020	−0.165	0.057
General health indexb	0.216	0.025	0.148	0.129	−0.126	0.195	−0.032	0.721	0.149	0.090	0.172	0.049
Body composition
BMI	−0.206	0.031	−0.072	0.460	0.016	0.870	−0.349	<0.001	−0.046	0.599	−0.061	0.486
Percentage body fat	−0.147	0.126	−0.014	0.883	0.189	0.049	−0.234	0.007	−0.070	0.426	0.076	0.386
Waist circumference	−0.277	0.004	−0.155	0.107	−0.073	0.453	−0.319	<0.001	−0.133	0.127	−0.140	0.108
Physical function
ISWT	0.260	0.007	0.317	0.001	−0.211	0.031	0.265	0.002	0.231	0.007	0.015	0.865
Usual walking speedc	0.215	0.024	0.199	0.038	−0.134	0.166	0.157	0.069	0.254	0.003	0.053	0.543

Notes:

^a0= female, 1= male;

^b1= no, 2= slight, 3= moderate, 4= severe, 5= unable/extreme problems; and

^c1= slow, 2= average, 3= fairly brisk, 4= brisk. Bold values represent P<0.05.

Abbreviations: BMI, body mass index; ISWT, incremental shuttle walk test; mMRC, modified Medical Research Council.