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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: Respir Med. 2017 Apr 5;127:1–6. doi: 10.1016/j.rmed.2017.04.002

Table 4.

Relationship Between ILD Subtype and the Physical Component Score: Multivariate Analysis

Model R2 Diagnosis of RA-ILD vs. IPF Age FVC% UCSD SOBQ Score Joint Pain or Stiffness
0.14 −0.24 (0.02) −0.02 (0.81) 0.30 (<0.01)
0.36 −0.19 (0.03) 0.07 (0.41) 0.16 (0.08) −0.50 (<0.01)
0.27 −0.02 (0.85) −0.05 (0.61) 0.37 (<0.01) −0.44 (<0.01)
0.45 −0.02 (0.86) 0.04 (0.59) 0.23 (<0.01) −0.45 (<0.01) −0.36 (<0.01)
0.45 0.05 (0.56) 0.23 (<0.01) −0.45 (<0.01) −0.37 (<0.01)

Data are presented as standardized β coefficients (P value).

RA-ILD = rheumatoid arthritis-associated interstitial lung disease. IPF = idiopathic pulmonary fibrosis. FVC% = percent predicted forced vital capacity. R2 = coefficient of determination. UCSD SOBQ = University of California, San Diego Shortness of Breath Questionnaire10.