Table 2.

6MWT as a categorical variable: univariate analyses.

FactorSSc Patients with Normal 6MWT, n = 61SSc Patients with Abnormal 6MWT, n = 26p
Disease duration, yrs7.7 ± 7.96.3 ± 6.60.436
FVC, % predicted104.3 ± 20.581.2 ± 27.7< 0.001
DLCO/VA, % predicted69.6 ± 19.652.5 ± 24.30.002
Baseline heart rate, bpm82.1 ± 15.791.7 ± 12.50.005
Exercise desaturation, n (%)12 (20)12 (46)0.023
Minimal saturation < 90%, n (%)6 (9.8)11 (42.3)< 0.001
CRP, mg/l4.5 ± 6.014.4 ± 19.30.001
Anti-topoisomerase I antibody, n (%)14 (23)13 (50)0.025
Medsger severity scale class 3–418 (30)16 (62)0.010
European activity score1.44 ± 1.222.56 ± 2.20.032
  • 6MWT: 6-min walk test. For other abbreviations see Table 1.