Application of the COOP/WONCA charts to aged patients with chronic obstructive pulmonary disease: a comparison between Japanese and Chinese populations

Table 5 Multiple-regression analyses of COOP/WONCA chart scores (dependent variables) and predictive variables

Dependent variables	Predictive variables	β	P	R²
				Adjusted R²
Physical fitness	Population group	0.125	< 0.001
	Age	0.152	< 0.001	0.245
	Sex	0.132	< 0.001	0.240
	COPD status	0.252	< 0.001
	Number of respiratory symptoms	0.161	< 0.001
	Heating sources
Feelings	Population group	−0.280	< 0.001
	Age			0.121
	Sex			0.119
	COPD status
	Number of respiratory symptoms	0.318	< 0.001
	Heating sources
Daily activities	Population group
	Age	0.107	0.020	0.257
	Sex			0.254
	COPD status	0.396	< 0.001
	Number of respiratory symptoms	0.184	< 0.001
	Heating sources
Social activities	Population group
	Age	−0.114	0.002	0.204
	Sex			0.201
	COPD status	0.264	< 0.001
	Number of respiratory symptoms	0.258	< 0.001
	Heating sources
Change of health	Population group	0.156	< 0.001
	Age			0.045
	Sex			0.042
	COPD status
	Number of respiratory symptoms
	Heating sources	−0.204	< 0.001
Overall health	Population group	0.216	< 0.001
	Age			0.199
	Sex			0.195
	COPD status	0.197	< 0.001
	Number of respiratory symptoms	0.172	< 0.001
	Heating sources
Pain	Population group	−0.185	< 0.001
	Age			0.117
	Sex	0.207	< 0.001	0.112
	COPD status	0.129	0.005
	Number of respiratory symptoms	0.234	< 0.001
	Heating sources

n = 737.
Population group (Japanese: 0, Chinese: 1) Sex (male: 0, female: 1), Heating sources (Biomass, coal, Animal dung: 1, Gas, Electric, Steam: 0) Number of respiratory symptoms (0–4), COPD status (health: 0, GOLD LV 1–4: 1–4).

ISSN: 1471-2458