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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.