Table I.

Patient characteristics.

n=129	Mean (SD)	Range
Age, yrs	48.8 (12.1)	22.3–83.1
Female sex (% of patients)	93 (72.1%)
Duration of scleroderma, yrs	3.0 (2.1)	0.05–12.0
FVC (% of predicted)	68.3 (11.8)	29.4–90.5
FEV1/FVC (%)*	83.2 (6.8)	61.0–99.0
Total lung capacity (% of predicted)#	69.5 (13.2)	24.0–100.0
Residual volume (% predicted)#	69.0 (25.9)	9.0–166.0
DLCO (% of predicted)	46.6 (14.0)	17.0–100.0
Cough, n. (% of patients)##	88 (70.4%)
Focal score for the Mahler Dyspnea Index+	5. (1.8)	0–10.0
Skin-thickening score**	14.2 (10.5)	0–45

^*n=126

^#n=127

^##n=125

⁺n=122

^**n=128; for all other characteristics, n=129.