Table 3.

Final multivariate regression model to determine clinical correlates of SF-36 PCS.

CharacteristicStandardized EstimatesLower CIUpper CI
Skin score−2.28−3.10−1.46
Shortness of breath*−5.10−5.97−4.23
No. of gastrointestinal symptoms*−2.64−3.52−1.76
No. of swollen joints*−1.74−2.55−0.92
  • * Square root transformation of variables was performed to improve fidelity to the regression assumptions. Coefficients are standardized by the standard deviations of the transformed variables in the regression (e.g., the coefficient for number of gastrointestinal symptoms is standardized by the standard deviation of the number of gastrointestinal symptoms).