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Table 5 Correlation matrix of the associations between pulmonary function (% predicted) and dyspnoea, ability to take deep breaths and cough 1 year after cardiac surgery (n = 150)

From: Pulmonary function and health-related quality of life 1-year follow up after cardiac surgery

Pulmonary function (percentage predicted) Dyspnoea (mMRC) Ability to take deep breaths (NRS) Ability to cough (NRS)
VC −0.17 (p = 0.054) −0.14 (p = 0.105) −0.15 (p = 0.090)
FVC −0.19* (p = 0.038) −0.16 (p = 0.065) −0.18* (p = 0.043)
FEV1 −0.18 (p = 0.050) −0.19* (p = 0.030) −0.19* (p = 0.030)
IC −0.09 (p = 0.340) −0.19* (p = 0.029) −0.15 (p = 0.087)
  1. mMRC, Modified Medical Research Council dyspnea scale; NRS: numeric rating scale
  2. *P-value < 0.05 was considered significant