Table 3.

Syphilis infection in relationship to demographic and risk-related characteristics among male patients attending an STI clinic in Puerto Rico, 2009–2010.

Characteristic	Syphilis negative % (n)	Syphilis positive % (n)	p-value
Age group
<45 years	84.4 (190)	61.8 (34)	<0.01
≥45 years	15.6 (35)	38.2 (21)
Education
<High school	67.9 (142)	57.4 (31)	>0.10
≥High school	32.1 (67)	42.6 (23)
Health care plan
Yes	60.4 (131)	62.3 (33)
No	39.7 (86)	37.7 (20)	>0.10
Lifetime alcohol use
Yes	61.2 (131)	54.7 (29)	>0.10
No	38.8 (83)	45.3 (24)
Lifetime cigarette use
Yes	46.7 (100)	45.3 (24)	>0.10
No	53.3 (114)	54.7 (29)
IDU
Yes	9.3 (20)	15.1 (8)	>0.10
No	90.7 (194)	84.9 (45)
Ever used non-injecting drugs
Yes	32.71 (70)	35.85 (19)	>0.10
No	67.29 (144)	64.15 (34)
MSM
Yes	25.82 (55)	43.40 (23)	0.01
No	74.18 (158)	56.60 (30)