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Table 5 Results of linear regression analysis to predict the changes in dyspnea

From: Analysis of longitudinal changes in dyspnea of patients with chronic obstructive pulmonary disease: an observational study

  Coefficient SE 95% CI P value
(A) Change in OCD (/year)
Intercept -0.17 0.14 -0.45-0.12 0.25
Change in FEV1 (ml/year) 15.9 4.4 7.2-24.5 <0.001
(B) Change in mMRC (/year)
Intercept 0.10 0.01 0.08-0.13 <0.001
Change in FEV1 (ml/year) -1.55 0.35 -2.25-0.85 <0.001
(C) Change in CRQ dyspnea (/year)
Intercept -0.07 0.01 -0.09-0.05 <0.001
Change in FEV1 (ml/year) 1.17 0.26 0.66-1.68 <0.001
(D) Change in SGRQ activity (/year)
Intercept 0.81 0.21 0.39-1.23 <0.001
Change in FEV1 (ml/year) -40.3 6.5 -53.1-27.5 <0.001
  1. CI confidence interval, FEV 1 forced expiratory volume in one second, OCD Oxygen Cost Diagram, mMRC modified Medical Research Council dyspnea scale, CRQ Chronic Respiratory Disease Questionnaire, SGRQ St. George’s Respiratory Questionnaire.