Table 1.
Demographic characteristics of patients.
Patients with Raynaud’s
Phenomenon Controls
Primary
Secondary
No.
13
44
60
Male/female
9/4
6/38
25/35
Age, mean ± SD yrs, (range)
38 ± 13 (19–61)
43 ± 13 (13–80)
45 ± 13 (20–65)