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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 3.

Unadjusted Associations Between Clinical Covariates and the Physical Component Score in RA-ILD and IPF Patients

Variable Standardized Coefficient P Value
Age 0.05 0.61
Male sex 0.24 0.02
Body-mass index −0.07 0.51
Ever smoker −0.11 0.27
ILD subtype −0.22 0.03
FVC% 0.29 <0.01
DLCO% 0.29 <0.01
Prednisone use at baseline −0.13 0.20
Diabetes mellitus −0.02 0.86
Sleep apnea 0.05 0.66
Fatigue −0.24 0.02
Cough −0.18 0.07
Joint pain or stiffness −0.38 <0.01
Weight loss −0.27 <0.01
Heartburn 0.09 0.36
UCSD SOBQ score −0.54 <0.01

FVC% = percent predicted forced vital capacity. DLCO% = percent predicted diffusing capacity for carbon monoxide. ILD = interstitial lung disease. UCSD-SOBQ = University of California San Diego Shortness of Breath Questionnaire10.