Table 1.

6MWD during the first 6MWT and the evolution of the 6MWD from baseline to 6-month visit in different subgroups of SSc patients without ILD and PAH

	N	First 6MWD	P	N	6MWD T0	6MWD T6	r	Mean Diff (95% CI)	P

		mean ± SD			mean ± SD	mean ± SD

SSc	271	460±108	*0.02	193	466±100	468±95	0.80	2 (−7; 11)	0.64
LSSc	70	476±109*^#^†	^#0.67	53	471±115	466±104	0.83	−5 (−23; 13)	0.58
LcSSc	156	463±101*^#^‡	^†0.02	109	474±87	477±80	0.72	3 (−8; 15)	0.57
DcSSc	45	422±118*^†^‡	^‡0.06	31	432±111	441±121	0.87	10 (−12; 32)	0.38

N: number of patients, T0: baseline visit, T6: 6-month visit, 6MWD and mean difference expressed in meter, r: Pearson's correlation coefficient, Diff: difference.