Table 5

Convergent validity: correlation between baseline QOL-B scores and other measures of health status

Correlations of baseline scores on QOL-B scales with other measures of health status
QOL-B scaleFEV1% predicted6MWTEQ-5D VAS
AIR-BX1
(N=266)		AIR-BX2
(N=274)		AIR-BX1
(N=266)		AIR-BX2
(N=274)		AIR-BX1
(N=266)		AIR-BX2
(N=274)
Respiratory Symptoms      
0.118
(n=266)
p=0.054		0.185
(n=274)
p=0.002		0.170
(n=266)
p=0.005		0.268
(n=274)
p<0.001		0.512
(n=262)
p<0.001		0.519
(n=267)
p<0.001
Physical Functioning    
 0.273
(n=266)
p<0.001		0.364
(n=274)
p<0.001		0.526
(n=266)
p<0.001		0.472
(n=274)
p<0.001		0.568
(n=262)
p<0.001		0.633
(n=267)
p<0.001
Vitality    
 0.011
(n=266)
p=0.86		0.115
(n=274)
p=0.06		0.294
(n=266)
p<0.001		0.267
(n=274)
p<0.001		0.546
(n=262)
p<0.001		0.631
(n=267)
p<0.001
Role Functioning      
 0.075
(n=266)
p=0.22		0.218
(n=274)
p<0.001		0.364
(n=266)
p<0.001		0.347
(n=274)
p<0.001		0.621
(n=262)
p<0.001		0.663
(n=267)
p<0.001
Health Perceptions   
 0.090
(n=266)
p=0.14		0.145
(n=274)
p=0.016		0.279
(n=266)
p<0.001		0.195
(n=274)
p=0.001		0.662
(n=262)
p<0.001		0.640
(n=267)
p<0.001
Emotional Functioning   
 −0.019
(n=266)
p=0.75		0.050
(n=274)
p=0.41		0.128
(n=266)
p=0.036		0.153
(n=274)
p=0.011		0.294
(n=262)
p<0.001		0.432
(n=267)
p<0.001
Social Functioning   
 −0.062
(n=266)
p=0.31		0.033
(n=274)
p=0.59		0.107
(n=266)
p=0.08		0.097
(n=274)
p=0.11		0.376
(n=262)
p<0.001		0.378
(n=267)
p<0.001
Treatment Burden*   
 0.004
(n=247)
p=0.95		0.061
(n=247)
p=0.34		0.154
(n=247)
p=0.016		−0.011
(n=247)
p=0.86		0.463
(n=244)
p<0.001		0.331
(n=241)
p<0.001

  • Spearman's correlation coefficients are presented.

  • *Patients who were not receiving treatment for bronchiectasis were instructed to skip the Treatment Burden scale; analyses presented in this table used responses from 247 patients in AIR-BX1 and 247 patients in AIR-BX2.

  • 6MWT, 6 min walk test; EQ-5D, Euro Quality of Life-5 Dimensions; QOL-B, Quality of Life-Bronchiectasis; VAS, visual analogue scale.