Table 1

 Baseline characteristics of all patients, classified by completion status of the 2-year study

CharacteristicAll (n = 134)Completers (n = 68)Non-completers (n = 66)
DLCO, diffusion capacity; ESR, erythrocyte sedimentation rate; FVC, forced vital capacity; HAQ-DI, Health Assessment Questionnaire—Disability Index; mRSS, modified Rodnan Skin Score; SSc, systemic sclerosis.
Values are mean (SD).
Student’s t tests between completers and non-completers: *p<0.05, **p<0.01.
Demographic
    Age (years)43.7 (12.4)44.2 (13.1)43.1 (11.7)
    Women (%)77.675.080.3
History
    Duration of SSc before entry (days)290 (125)285 (129)295 (122)
Physical examination
    mRSS, range 0–5121 (8)20 (8)22 (7)
    HAQ-DI score, range 0–31.0 (0.7)1.0 (0.6)1.1 (0.7)
    Tender joint count, range 0–81.5 (2.4)1.5 (2.2)1.5 (2.5)
    Swollen joint count, range 0–80.9 (1.6)0.8 (1.3)1.0 (1.8)
Laboratory results
    Haematocrit (%)39.0 (3.8)39.8 (3.3)*38.2 (4.1)
    ESR (mm in 1st h)24 (17)21 (14)27 (20)
    Creatine kinase (% upper limit of normal)81.7 (124.1)83.3 (156.0)80.1 (81.1)
    DLCO (% of predicted)75.3 (18.4)75.7 (17.7)74.9 (19.2)
    FVC (% of predicted)84 (17)85 (19)83 (15)
    Serum creatinine (mg/dl)0.89 (0.19)0.91 (0.19)**0.85 (0.19)