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Table 3 Concurrent validity of SGRQ-I

From: Validation of the IPF-specific version of St. George’s Respiratory Questionnaire

  SGRQ-I Total SGRQ-I Symptoms SGRQ-I Activities SGRQ-I Impacts
K-BILD total −0.76* − 0.58* − 0.71* −0.70*
K-BILD chest symptoms −0.69* −0.64* − 0.54* −0.66*
K-BILD breathlessness and activities −0.78* −0.57* − 0.76* −0.70*
K-BILD psychological −0.58* −0.47* − 0.52* −0.55*
SOBQ total 0.80* 0.54* 0.74* 0.76*
SF-36 PCS −0.71* − 0.50* −0.63* − 0.68*
SF-36 MCS −0.46* − 0.40* −0.34* − 0.46*
FVC% −0.30* − 0.32* −0.20* − 0.30*
DLCO% −0.48* − 0.28* −0.53* − 0.42*
6MWD (m) −0.50* − 0.25* −0.46* − 0.52*
  1. All data are presented as Pearson’s correlation coefficients for all patients. *: p < 0.02. SGRQ-I: IPF-specific version of the St. George’s Respiratory Questionnaire; K-BILD: King’s Brief Interstitial Lung Disease questionnaire; SOBQ: University of California, San Diego Shortness of Breath Questionnaire; SF-36: Short Form-36; PCS: Physical Component Score; MCS: Mental Component Score; FVC: Forced vital capacity; DLCO: Diffusing capacity of the lung for carbon monoxide; 6MWD: Distance walked during the 6-min walk test