Table 1.

Baseline study population characteristics (N = 265).

Characteristic	Mean ± SD or n (%)
Age at time of high-resolution computed tomography (HRCT), years	50 ± 12
Sex, woman	216 (82)
Body mass index, kg/m2	29 ± 6
Ethnicity, white	192 (73)
Smoker, current or former	97 (37)
Alcohol, current	96 (46)
Proton pump inhibitor use, current	171 (65)
SSc disease subtype
Diffuse cutaneous	129 (49)
Limited cutaneous	131 (49)
Sine scleroderma	5 (2)
Years since first non-Raynaud SSc symptom to HRCT date	6 ± 11
Systemic sclerosis specific antibodies, positive
Anti-topoisomerase I (Scl-70)	78 (30)
Anticentromere (ACA)	48 (18)
Anti RNA polymerase III	59 (23)
Modified Rodnan skin score	13 (11)
Radiographic interstitial lung disease present	188 (71)
Forced vital capacity (FVC) % predicted	76 (18)
Diffusing capacity for carbon monoxide (DLCO) % predicted	60 (20)