Table 3.

Linear regression results to identify the predictors of the difference between patient and physician global assessments of severity in the Canadian data. Values in bold indicate CI that do not include 0. Note that creatinine was transformed by taking the square root in order to improve model assumptions and decrease the influence of outlying points on the results. Results are given in terms of the square root of creatinine.

Estimated Coefficient (95% CI)p
Age−0.003 (−0.017, 0.011)0.63
Female0.015 (0−0.483, 0.453)0.95
White0.253 (−0.145, 0.652)0.21
Duration0.010 (−0.008, 0.029)0.28
Education beyond high school−0.043 (−0.360, 0.274)0.79
Shortness of breath0.007 (−0.062, 0.076)0.85
Pain0.327 (0.256, 0.399)< 0.0001
Gastrointestinal symptoms0.136 (0.067, 0.206)< 0.0005
Fatigue−0.015 (−0.023, −0.006)< 0.001
Raynaud’s0.164 (0.100, 0.227)< 0.0001
Skin score−0.069 (−0.86, −0.052)< 0.0001
Fingertip ulcers0.000 (−0.068, 0.068)0.99
Swollen joints0.017 (−0.058, 0.092)0.66
Tender joints−0.015 (−0.062, 0.032)0.52
Creatinine−0.102 (−0.192, −0.013)0.025
Deviance explained37.95%