Table 5

Cross-sectional validity for the fatigue, emotion and mastery domains. Correlations for baseline scores.

Instrument and domain

CRQ-IA Domains

CRQ-SA Domains


Fatigue†

Emotion†

Mastery†

Fatigue†

Emotion†

Mastery†


Feeling Thermometer

0.10 (-0.07;0.27)

0.08 (-0.09;0.25)

0.17 (0.01;0.33)

0.16 (0.00;0.32)

0.19 (0.03;0.35)

0.30 (0.14;0.46)

SF-36-General Health Perception Index

0.46 (0.31;0.61)

0.28 (0.12;0.44)

0.36 (0.20;0.52)

0.18 (0.01;0.35)

0.12 (-0.05;0.29)

0.38 (0.22;0.54)

SF-36-Physical Functioning Index

0.45 (0.30;0.60)

-0.07 (-0.24;0.10)

0.30 (0.14;0.46)

0.21 (0.04;0.38)

-0.15 (-0.32;0.02)

0.39 (0.23;0.55)

SF-36-Mental Health Index

0.53 (0.38;0.68)

0.72 (0.60;0.84)

0.62 (0.49;0.75)

0.63 (0.50;0.76)

0.69 (0.57;0.81)

0.42 (0.26;0.58)

SF-36-Vitality Index

0.72 (0.60;0.84)

0.63 (0.50;0.76)

0.67 (0.54;0.80)

0.66 (0.53;0.79)

0.50 (0.35;0.65)

0.49 (0.34;0.64)

Six minutes walk test

0.35§ (0.18;0.52)

0.24 (0.08;0.40)

0.30 (0.14;0.46)

0.00§ (-0.17;0.17)

-0.04 (-0.21;0.13)

0.00 (-0.17;0.17)

Borg Scale

-0.16 (-0.34;0.02)

-0.11 (-0.28;0.06)

-0.11 (-0.28;0.08)

-0.11 (-0.28;0.06)

-0.18 (-0.35;-0.01)

-0.31 (-0.47;-0.15)


CRQ-IA = Interviewer administered German Chronic Respiratory Questionnaire CRQ-SA = Self-administered German Chronic Respiratory Questionnaire † Pearson Correlation Coefficient (95% confidence intervals); r > 0.28 significant at p < 0.05 § indicate significant differences between the domains of the CRQ-IA and CRQ-SA

Puhan et al. Health and Quality of Life Outcomes 2004 2:1   doi:10.1186/1477-7525-2-1

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