Table 3.

Correlations Between Variables.

N=36	6MWD
	r	P
MSS	-0.545	0.002*
mRSS	-0.528	0.003*
FEV1 (L)	0.393	0.032*
FEV1 (% predicted)	0.224	0.235
FVC (L)	0.504	0.005*
FVC (% predicted)	0.357	0.053
FEV1/FVC (%)	-0.453	0.012*
TLC (L)	0.413	0.026*
TLC (% predicted)	0.300	0.114
DLCO (L)	0.280	0.157
DLCO (% predicted)	0.399	0.044*
Right quadriceps strength (kg)	0.046	0.796
HAQ	-0.392	0.018*
UCLA SCTC GIT 2	-0.104	0.546
MAS	0.472	0.004*
IPAQ	0.234	0.170

FEV₁: forced expiratory volume in the first second, FVC: forced vital capacity, TLC: total lung capacity, DLCO: diffusing capacity for carbon monoxide, MSS: Medsger Systemic Sclerosis Severity Scale, HAQ: Health Assessment Questionnaire, mRSS: modified Rodnan Skin Score, UCLA SCTC GIT 2: University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract 2.0, IPAQ: International Physical Activity Questionnaire, MAS: Milliken Activities of Daily Living Scale, 6MWD: Six-Minute Walk Distance, r: Spearman’s rho,

^*p<0.05.