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. 2011 Oct 7;6:511–519. doi: 10.2147/COPD.S24230

Table 2.

General health and quality of life (n = 1 475)

Combined 2004 + 2008
n = 1 475
2004
n = 664
2008
n = 811
P value
General health status (%) 0.038
 Very good 1.7 1.5 1.9
 Good 22.0 19.5 24.1
 Neither good nor poor 43.9 44.8 43.3
 Poor 28.1 28.5 27.8
 Very poor 4.2 5.7 3.0
GHQ12; not impaired psychological well-being (%) 76.7 74.5 78.5 0.04
EQ-5D index value [0–1] 0.63 (0.27) 0.61 (0.28) 0.65 (0.26) 0.002
EQ-5D no problems (%)
 Mobility 48.6 46.9 50.1 0.11
 Self-care 89.8 88.5 90.8 0.08
 Usual activities 61.3 58.6 63.5 0.03
 Pain/discomfort 13.6 12.4 14.5 0.12
 Anxiety/depression 49.4 47.3 51.1 0.07

Notes: Differences for 2004–2008 were tested using t test for EQ-5D. Differences between proportions were tested using the asymptotic normal test for binomial data. The difference in general health was tested with a chi-square test.

Abbreviations: GHQ12, General Health Questionnaire 12-item version, impaired well-being defined as present when the total score was 3 or higher; EQ-5D, EuroQol five-dimension questionnaire, index value (standard deviation): [1 = full health, 0 = death].