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Table 5 Correlations between study measures and diurnal cortisol slope

From: The longitudinal impact of low-dose morphine on diurnal cortisol profiles in people with chronic breathlessness and chronic obstructive pulmonary disease (COPD): an exploratory study

 

Ln- Diurnal slope

Baseline

(n = 20)

End of week 1

(n = 17)

End of week 3

(n = 11)

At least 3 months on the blinded extension study

(n = 7)

Worst

(NRS)

r = 0.33

p = 0.15

r = 0.27

p = 0.29

r = 0.33

p = 0.36

r = 0.79

p = 0.11

Average

(NRS)

rs = 0.30

p = 0.21

rs = 0.31

p = 0.23

r = 0.08

p = 0.82

r = 0.89

p = 0.04

Distress

(NRS)

r=-0.01

p = 0.98

r = 0.02

p = 0.93

r=-0.37

p = 0.29

r = 0.10

p = 0.87

mMRC

rs=-0.18

p = 0.45

rs=-0.45

p = 0.07

rs=-0.56

p = 0.08

-

AKPS

rs=-0.66

p = 0.001

rs=-0.12

p = 0.66

rs=-0.24

p = 0.49

rs = 0.00

p = 1.00

QOL (EQ-5D-5 L VAS)

r = 0.14

p = 0.56

r=-0.14

p = 0.59

-

rs=-0.62

p = 0.27

Subjective sleep quality

rs=-0.61

p = 0.005

rs=-0.42

p = 0.10

rs=-0.29

p = 0.43

rs = 0.58

p = 0.31

HADS– anxiety

r=-0.15

p = 0.54

r = 0.04

p = 0.89

-

-

HADS– depression

r = 0.09

p = 0.73

r=-0.50

p = 0.04

-

-

Global impression of change

-

rs = 0.03

p = 0.91

rs = 0.10

p = 0.78

rs = 0.98

p = 0.01

  1. NRS = Numerical rating scale; mMRC = modified Medical Research Council scale; AKPS = Australian Karnofsky Performance Status; QOL (EQ-5D-5 L) = Quality of life measured using the EQ-5D-5 L questionnaire; HADS = Hospital Anxiety and Depression Scale. Subjective sleep quality measured with a 4-point Likert scale; Global impression of change measured with a 7-point Likert scale. Statistically significant correlations indicated in light grey