Verification of a Motion Sensor for Evaluating Physical Activity in COPD Patients

Table 2

Correlations between physical activity and demographic factors.

	≥2.0 METs		≥3.0 METs		≥4.0 METs
	value	value	value	value	value	value
Age	0.061	0.792	−0.293	0.197	−0.437	0.048
BMI	0.024	0.918	0.031	0.895	0.240	0.296
Smoking (pack-year)	−0.170	0.462	0.194	0.399	0.331	0.143
mMRC score	—	0.024	—	0.004	—	0.038
Goddard score	−0.405	0.068	−0.289	0.204	−0.197	0.392
FVC% predicted	0.403	0.070	0.487	0.025	0.448	0.041
FEV1/FVC	0.244	0.286	0.341	0.130	0.349	0.121
FEV1% predicted	0.409	0.066	0.424	0.056	0.381	0.088
IC	−0.335	0.138	−0.055	0.806	0.068	0.769

BMI: body mass index; mMRC: modified Medical Research Council; FVC: forced vital capacity; FEV1: forced expiratory volume in one second; IC: inspiratory capacity.