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Table 3 Spearman correlation coefficients among PRO measures and 6MWD

From: The 6-minute walk test predicts mortality in a pulmonary nontuberculous mycobacteria-predominant bronchiectasis cohort

 

SGRQ Total Score

6MWD

MRC Dyspnea Scale

6MWD

− 0.53*

NA

NA

MRC Dyspnea Scale

0.6*

− 0.35*

NA

PSSS-severity

0.76*

− 0.46*

0.45*

PSSS-frequency

0.76*

− 0.4*

0.45*

  1. 6MWD 6-minute walk distance, MRC Medical Research Council, SGRQ St. George’s Respiratory Questionnaire, PSSS Pulmonary Symptom Severity Score (contains two components -severity and -frequency)
  2. *Significant at p < 0.001