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Table 1 Baseline characteristics of men who have sex with men and male-to-female transgender participants of the PICASSO study, Lima, Peru, 2013–2014

From: The PICASSO Cohort: baseline characteristics of a cohort of men who have sex with men and male-to-female transgender women at high risk for syphilis infection in Lima, Peru

Characteristic

MSM

Transwomen

n (N = 312) (%)

n (N = 89) (%)

Survey

 Age median years (Interquartile range [IQR])

29.0 (23.3, 37.4)

32.5 (27.2, 39.5)

 Income less than living wagea

87 (27.9)

62 (76.5)

 Education

  Primary school or less

7 (2.2)

8 (9.0)

  Secondary school or less

111 (35.6)

65 (73.0)

  Vocational school graduate

69 (22.1)

11 (12.4)

  University student

90 (28.9)

3 (3.4)

  University graduate or higher

40 (11.2)

2 (2.3)

 Work

  Full time

157 (50.3)

33 (37.1)

  Part time

41 (13.1)

23 (25.8)

  Odd jobs

46 (14.7)

26 (29.2)

  Unemployed or does not work

68 (21.8)

7 (7.9)

 Use of antibiotics in the last 3 months

123 (39.4)

37 (41.6)

 Use of un-prescribed injections in the last 3 months

93 (29.8)

27 (30.3)

 Comorbidities (by self-report in the survey):

  Prior diagnosis of syphilis

111 (35.6)

35 (39.3)

  Prior diagnosis of HIV

62 (24.1)

21 (27.6)

   Not taking ART

34/62 (54.8)

11/21 (52.4)

    Recent syphilis by laboratory testing

8/34 (23.5)

1/11 (9.1)

    Diagnosis of STI in the last 6 months

22/34 (64.7)

5/11 (45.5)

 Primary role during anal sex

  Insertive

87 (27.9)

2 (2.3)

  Receptive

68 (21.8)

60 (67.4)

  Versatile (e.g. both)

157 (50.3)

27 (30.3)

 Stableb partner, last 3 months

141 (45.2)

47 (52.8)

 Sex with a male partner, last 3 months

312 (100)

81 (100)

 Median number of male partner(s), last 3 months (IQR)

4 (2, 7)

15 (5, 40)

 Sex with a female partner, last 3 months

45 (14.4)

1 (1.1)

 Alcohol use disorder (AUDIT score > 8)

139 (44.6)

42 (47.2)

Laboratory

  Syphilis infection

   Recent syphilis (RPR ≥ 1:16)

52 (16.8)

6 (6.7)

   Prior syphilis infectionc (RPR between 1:1–1:8)

79 (25.3)

45 (50.6)

   No syphilis infectiond

157 (50.8)

38 (42.7)

  HIV infection

94 (30.1)

30 (33.7)

  Total Chlamydia trachomatis (CT)

57 (18.6)

22 (24.7)

   Anal CT

43 (14.1)

12 (13.5)

   Pharyngeal CT

14 (4.5)

10 (11.2)

  Total Neisseria gonorrheae (NG)

44 (14.2)

17 (19.1)

   Anal NG

26 (8.4)

10 (11.2)

   Pharyngeal NG

18 (5.8)

7 (7.9)

  Co-infections with recent syphilis (n = 58, MSM [N = 52]; Transwomen [N = 6])

   HIV

23 (44.2)

4 (66.7)

   Total CT

21 (40.4)

0 (0)

   Anal CT

17 (32.7)

0 (0)

   Pharyngeal CT

4 (7.7)

0 (0)

   Total NG

10 (19.2)

1 (16.7)

   Anal NG

6 (11.5)

1 (16.7)

   Pharyngeal NG

4 (7.7)

0 (0)

  1. Human immunodeficiency virus (HIV); antiretroviral therapy (ART); Rapid plasma reagin (RPR); Treponema Pallidum Particle Agglutination (TPPA); Chlamydia trachomatis (CT); Neisseria gonorrheae (NG); and sexually transmitted infection (STI)
  2. aLiving wage was approximately $250 USD per month in 2013–2014
  3. bThe participant self-identified that they had a stable sexual partner
  4. cTPPA positive individuals that did not meet criteria for recently acquired syphilis infection
  5. dRPR-negative and TPPA-negative individuals