Table 1.

Subject characteristics (n = 51)^a

Variable	Subjects	Control (N, %)	CTD-IP (N, %)	P-Value
Total	51	23 (45.1)	28 (54.9)
Age				0.723
≥50 years	28	12 (42.9)	16 (57.1)
<50 years	23	11 (47.8)	12 (52.2)
Gender				0.654
Male	22	10 (45.5)	12 (54.5)
Female	29	13 (44.8)	16 (55.2)

^aData are expressed as number (percentage)