Table 1.

Patient characteristics.

Characteristic	Study Subjects, n = 586 Mean (SD) or %	Subjects Excluded for Missing Data, Total n = 203 Mean (SD) or % [% missing]
Age, yrs	55.4 (12.1)	55.3 (12.9) [0]
Female, %	87	84 [0]
Disease duration, yrs	10.5 (8.6)	11.0 (9.7) [12]
Meet ACR classification criteria, %	77	70.5 [4]
Diffuse cutaneous disease, %	39	46 [0]
Physician global assessment of disease severity (11-point numerical rating scale)	2.8 (2.2)	2.9 (2.2) [0]
Lung involvement, %	75	80 [27]
Heart involvement, %	27	25 [25]
No. of GI complaints, maximum = 14	4.0 (3.0)	4.6 (3.3) [7]
Oral aperture, mm	39.0 (3.0)	38.0 (9.2) [10]
Hemoglobin, g/dl	130.0 (14.5)	131.4 (16.9) [26]
Abdominal distension on physical examination, %	7	9 [1]
Dry mouth, %	45	48 [4]
Malabsorption suspected by physician, %	11	12 [1]
Body mass index	26.0 (5.7)	25.3 (6.0) [6]
MUST score	0.5 (0.9)	0.7 (1.1) [11]