Comparison of health-related quality of life measures in chronic obstructive pulmonary disease

Table 3 Correlations between Clinical and HRQL Measures

	FEV ₁	6MWT	Borg Dyspnea	SF-36 PCS	SF-36 MCS	EQ-5D index (UK)	EQ-5D index (US)	EQ-5D VAS	SGRQ Total	SGRQ Symptom	SGRQ Activity
FEV₁	1
6MWT	0.28^†	1
Borg Dyspnea	-0.41^§	-0.21^†	1
SF-36 PCS	0.19^†	0.40^§	-0.58^§	1
SF-36 MCS	0.14	0.16	-0.34^§	0.15	1
EQ-5D Index(UK)	0.01	0.21^†	-0.48^§	0.51^§	0.54^§	1
EQ-5D Index (US)	0.03	0.21^†	-0.48^§	0.51^§	0.56^§	0.99^§	1
EQ-5D VAS	0.16	0.31^§	-0.48^§	0.69^§	0.49^§	0.52^§	0.53^§	1
SGRQ Total	-0.43^§	-0.30^§	0.76^§	-0.67^§	-0.50^§	-0.55^§	-0.57^§	-0.60^§	1
SGRQ Symptom	-0.24^†	-0.03	0.51^§	-0.42^§	-0.35^§	-0.36^§	-0.38^§	-0.36^§	0.73^§	1
SGRQ Activity	-0.45^§	-0.46^§	0.70^§	-0.67^§	-0.40^§	-0.47^§	-0.48^§	-0.53^§	0.88^§	0.48^§	1
SGRQ Impact	-0.36^§	-0.21^†	0.72^§	-0.59^§	-0.50^§	-0.56^§	-0.58^§	-0.60^§	0.94^§	0.63^§	0.72^§

ISSN: 1477-7525