Table 2

Pearson correlation coefficients among variables

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Impact of disease
 Pain (1)1.00
 Functional disability (2)0.82**1.00
 Fatigue (3)0.76**0.82**1.00
 Sleep (4)0.66**0.69**0.71**1.00
 Physical well-being (5)0.75**0.82**0.84**0.73**1.00
 Emotional well-being (6)0.71**0.72**0.77**0.75**0.85**1.00
 Coping (7)0.72**0.74**0.79**0.70**0.81**0.80**1.00
RAID score (8)0.89**0.91**0.91**0.83**0.92**0.89**0.89**1.00
Quality of life (9)−0.60**−0.69**−0.68**−0.59**−0.69**−0.64**−0.63**−0.73**1.00
Positive personality
 Extraversion (10)−0.18**−0.20**−0.23**−0.20**−0.21**−0.19**−0.24**−0.23**0.23**1.00
 Agreeableness (11)−0.03−0.01−0.03−0.10−0.03−0.14*−0.10−0.070.040.041.00
 Conscientiousness (12)−0.01−0.06−0.08−0.15*−0.07−0.15*−0.12−0.10.100.28**0.40**1.00
 Emotional stability (13)−0.21**−0.26**−0.29**−0.29**−0.29**−0.35**−0.25**−0.31**0.25**0.32**0.20**0.21**1.00
 Openness to experience (14)−0.16*−0.21**−0.27**−0.11−0.21**−0.18**−0.24**−0.23**0.15*0.39**0.18**0.28**0.21**1.00
Happiness
 SHS 1 (15)−0.22**−0.21**−0.28**−0.29**−0.25**−0.32**−0.29**−30**0.31**0.36**0.120.24**0.32**0.17*1.00
 SHS 2 (16)−0.26**−0.23**−0.31**−0.30**−0.30**−0.33**−0.32**−0.33**0.36**0.33**0.17*0.28**0.31**0.23**0.82**1.00
 SHS 3 (17)−0.26**−0.18**−0.28**−0.25**−0.29**−0.31**−0.32**−0.30**0.33**0.39**0.100.23**0.31**0.25**0.58**0.60**1.00
 SHS 4 (18)0.040.090.050.040.080.070.090.08−0.07−0.020.03−0.01−0.04−0.050.040.020.091.00
SHS three-item score (19)−0.28**−0.24**−0.33**−0.32**−0.33**−0.37**−0.36**−0.35**0.38**0.41**0.15*0.29**0.36**0.25**0.90**0.91**0.84**0.071.00
DAS28CRP3v (20)0.34**0.35**0.31**0.32**0.35**0.30**0.32**0.37**−0.34**−0.001−0.050.01−0.110.01−0.15*−0.21**−0.15*0.09−0.20**1.00

  • DAS28CRP3v, Disease Activity Score using 28 joints and C reactive protein and three variables; RAID, Rheumatoid Arthritis Impact of Disease; SHS, Subjective Happiness Scale.

  • *P<0.05, ** P<0.001.