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. Author manuscript; available in PMC: 2022 Dec 1.
Published in final edited form as: Sex Transm Dis. 2021 Dec 1;48(12):915–918. doi: 10.1097/OLQ.0000000000001476

Table 1.

Characteristics of study participants

Characteristic Cases
n=123
Other Study Participants
n=221

Controls

Group 1
n=60
Group 2
n=88
Group 3
n=73

Male 119 (96.7) 45 (75.0) 72 (81.8) 71 (97.3)

White 74 (60.2) 24 (40.0) 51 (58.0) 55 (75.3)
Black 12 (9.8) 28 (46.7) 11 (12.5) 6 (8.2)
Other 37 (30.1) 8 (13.3) 26 (29.5) 12 (16.4)

Age (years) 33 (27-41)
n=122
50 (46-57) 30 (24-36) 37 (29-48)

Men who have sex with men 105 (92.9)
n=113
32 (53.3) 55 (62.5) 67 (91.8)

Stage
 Primary 29 (23.8) NA NA 12 (16.4)
 Secondary 55 (45.1) 26 (35.6)
 Early latent 26 (21.3) 23 (31.5)
 Late latent 11 (9.0) 12 (16.4)
 Sexual contact with an individual with infectious syphilis in the last 90 days 1 (0.8)
n=122
--

Serum rapid plasma reagin titer 64 (16-128)
n=119
64 (32-256)

PLWH 32 (26.2)
n=122
60 (100.0) 3 (3.4) 39 (53.4)

Cases were individuals with untreated syphilis diagnosed at a Sexual Health Clinic. Control group 1 included persons living with HIV (PLWH) without syphilis, control group 2 included Sexual Health Clinic attendees without syphilis, and group 3 included those recently treated for uncomplicated syphilis. Stage for group 3 refers to the stage for which they were treated. Values are expressed as number (percent) or median (interquartile range). Abbreviations: NA, not applicable.