Table 2 Correlation coefficients between SGRQ scores and other patient-reported assessments of health status

Chang et al., 1999 [15]

Borg Dyspnea Index

0.56^†

Lechtzin et al., 2013 [21]

CQLQ

Total

0.72*

0.72^‡

0.81^‡

0.79^‡

Physical complaints

0.50*

0.72^‡

0.71^‡

0.77^‡

Psychological issues

0.29

0.40

0.62^†

0.54*

Functional ability

0.53*

0.54*

0.66^†

0.66^†

Emotional well-being

0.19

0.42

0.57^†

0.50*

Extreme physical complaints

0.38

0.34

0.63^†

0.54*

Personal safety fears

0.05

0.23

0.45*

0.34

Nishiyama et al., 2005 [24]

BDI

−0.55^‡

−0.77^§

−0.53^‡

−0.69^§

Patel et al., 2012 [27]

K-BILD

Total

−0.67^†

−0.79^†

−0.87^†

−0.89^†

Psychological

−0.60^†

−0.67^†

−0.80^†

−0.79^†

Breathlessness

−0.59^†

−0.84^†

−0.80^†

−0.86^†

Chest

−0.65^†

−0.64^†

−0.79^†

−0.78^†

Peng et al., 2008 [28]

Dyspnea score

NS

0.58^§

0.30^†

0.38^‡

Swigris et al., 2012 [35]

UCSD-SOBQ

0.80^§

Yorke et al., 2010¹[10]

BDI

−0.39^§

−0.72^§

−0.61^§

−0.68^§

SF-36 PCS

−0.52^§

−0.74^§

−0.63^§

−0.71^§

Borg Dyspnea Index

0.35^§

0.45^§

0.40^§

0.45^§

Yorke et al., 2011 [39]

D-12

0.57^‡

0.78^‡

0.75^‡

0.79^‡

Zimmermann et al., 2007 [40]

BDI

−0.62*

−0.75*

−0.63*

−0.72*

Nishiyama et al., 2008 [25]

Δ BDI

−0.29

Peng et al., 2008 [28]

Δ Dyspnea score

NS

0.59^†

0.56^†

0.45^†