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. 2009 Apr 15;4:9–18.

Table 4.

Spearman correlation coefficients between VSRQ and SGRQ at screening visit (n = 636) (p < 0.0001)

Shortness of breath Daily activities impact Social life impact Sexual life impact Pleasure impact Energy impact Worry impact Sleep impact VSRQ total score
Symptoms sub-score −0.43 −0.40 −0.31 −0.26 −0.40 −0.39 −0.30 −0.32 −0.50
Impacts sub-score −0.48 −0.55 −0.51 −0.38 −0.56 −0.51 −0.39 −0.42 −0.68
Activities sub-score −0.43 −0.56 −0.40 −0.35 −0.52 −0.47 −0.26 −0.28 −0.58
SGRQ total score −0.52 −0.59 −0.50 −0.38 −0.59 −0.54 −0.38 −0.41 −0.70

Abbreviations: SGRQ, St George’s Respiratory Questionnaire; VSRQ, Visual Simplified Respiratory Questionnaire.