Overall study population characteristics and their bivariate associations with anal and pharyngeal infections caused by Chlamydia trachomatis and Neisseria gonorrhoeae among 718 MSM/TW participants in Lima, Peru, 2008–2009
| Total enrolled (N=718) n (%) | Provided anal swabs (N=701) | Provided throat swabs (N=712) | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chlamydia trachomatis | Neisseria gonorrhoeae | Chlamydia trachomatis | Neisseria gonorrhoeae | ||||||||||||||||||||
| Characteristics | Positive=133 n (%) | Negative=568 n (%) | Positive=67 n (%) | Negative=634 n (%) | Positive=34 n (%) | Negative=678 n (%) | Positive=46 n (%) | Negative=666 n (%) | |||||||||||||||
| Demographic characteristics | |||||||||||||||||||||||
| Age (years) | |||||||||||||||||||||||
| Median (IQR) | 29 | (23–35) | 26 | (22–30) | 29 | (24–36) | <0.05 | 24 | (21–29) | 29 | (23–36) | <0.05 | 25 | (22–29) | 29 | (23–36) | <0.05 | 25 | (23–29) | 29 | (23–36) | <0.05 | |
| Tertile 1: 18–25 | 261 | (36.4) | 61 | (24.1) | 192 | (75.9) | 37 | (14.6) | 216 | (85.4) | 18 | (7.0) | 241 | (93.0) | 24 | (9.3) | 235 | (90.7) | |||||
| Tertile 2: 26–33 | 242 | (33.7) | 50 | (21.2) | 186 | (78.8) | <0.05 | 25 | (10.6) | 211 | (89.4) | <0.05 | 12 | (5.0) | 227 | (95.0) | 0.05 | 16 | (6.7) | 223 | (93.3) | <0.05 | |
| Tertile 3: 34–45 | 215 | (29.9) | 22 | (10.4) | 190 | (89.6) | 5 | (2.4) | 207 | (97.6) | 4 | (1.9) | 210 | (98.1) | 6 | (2.8) | 208 | (97.2) | |||||
| Educational attainment | |||||||||||||||||||||||
| At least some beyond HS | 204 | (28.4) | 42 | (21.1) | 157 | (78.9) | 19 | (9.6) | 180 | (90.4) | 9 | (4.5) | 192 | (95.5) | 15 | (7.5) | 186 | (92.5) | |||||
| Full/partially attended HS | 448 | (62.4) | 83 | (19.0) | 353 | (81.0) | 0.27 | 38 | (8.7) | 398 | (91.3) | 0.25 | 22 | (4.9) | 423 | (95.1) | 0.96 | 24 | (5.4) | 421 | (94.6) | 0.22 | |
| Elementary or none | 66 | (9.2) | 8 | (12.1) | 58 | (87.9) | 10 | (15.2) | 56 | (84.8) | 3 | (4.6) | 63 | (95.4) | 7 | (10.6) | 59 | (89.4) | |||||
| Self-reported sexual identity | |||||||||||||||||||||||
| Gay/homosexual | 465 | (64.8) | 87 | (19.2) | 366 | (80.8) | 39 | (8.6) | 414 | (91.4) | 19 | (4.1) | 441 | (95.9) | 25 | (5.4) | 435 | (94.6) | |||||
| Transgender women | 208 | (29.0) | 41 | (20.1) | 163 | (79.9) | 0.40 | 25 | (12.3) | 179 | (87.7) | 0.28 | 14 | (6.7) | 194 | (93.3) | 0.25 | 20 | (9.6) | 188 | (90.4) | 0.06 | |
| Bisexual/heterosexual | 45 | (6.2) | 5 | (11.4) | 39 | (88.6) | 3 | (6.8) | 41 | (93.2) | 1 | (2.3) | 43 | (97.7) | 1 | (2.3) | 43 | (97.7) | |||||
| Sexual characteristics | |||||||||||||||||||||||
| Sexual role during anal sex | |||||||||||||||||||||||
| Pasivo | 485 | (67.5) | 89 | (18.8) | 384 | (81.2) | 45 | (9.5) | 428 | (90.5) | 23 | (4.8) | 458 | (95.2) | 30 | (6.2) | 451 | (93.8) | |||||
| Moderno | 188 | (26.2) | 41 | (22.2) | 144 | (77.8) | 0.07 | 20 | (10.8) | 165 | (89.2) | 0.46 | 9 | (4.8) | 177 | (95.2) | 0.99 | 13 | (7.0) | 173 | (93.0) | 0.94 | |
| Activo | 45 | (6.3) | 3 | (7.0) | 40 | (93.0) | 2 | (4.7) | 41 | (95.3) | 2 | (4.4) | 43 | (95.6) | 3 | (6.7) | 42 | (93.3) | |||||
| Sexual debut | |||||||||||||||||||||||
| Median (IQR) | 14 | (12–16) | 14 | (12–16) | 14 | (12–16) | 0.12 | 14 | (12–15) | 14 | (12–16) | 0.24 | 13 | (12–15) | 14 | (12–16) | 0.15 | 14 | (13–17) | 14 | (12–16) | 0.50 | |
| Tertile 1: 13 or younger | 294 | (41.0) | 61 | (21.0) | 229 | (79.0) | 28 | (9.7) | 262 | (90.3) | 18 | (6.2) | 274 | (93.8) | 15 | (5.1) | 277 | (94.9) | |||||
| Tertile 2: 14–15 | 188 | (26.2) | 38 | (20.8) | 145 | (79.2) | 0.16 | 24 | (13.1) | 159 | (86.9) | 0.08 | 9 | (4.8) | 179 | (95.2) | 0.25 | 14 | (7.5) | 174 | (92.5) | 0.49 | |
| Tertile 3: 16 or older | 236 | (32.8) | 34 | (14.9) | 194 | (85.1) | 15 | (6.6) | 213 | (93.4) | 7 | (3.0) | 225 | (97.0) | 17 | (7.3) | 215 | (92.7) | |||||
| Sexual partners over the past 6 months* | |||||||||||||||||||||||
| Median (IQR) | 5 | (2–15) | 5 | (2–15) | 4 | (2–15) | 0.67 | 7 | (4–30) | 4 | (2–15) | <0.05 | 7 | (3–30) | 4 | (2–15) | <0.05 | 6 | (2–18) | 4 | (2–15) | 0.56 | |
| 1 partner | 111 | (16.1) | 14 | (12.8) | 95 | (87.2) | 0.11 | 5 | (4.6) | 104 | (95.4) | <0.05 | 2 | (1.9) | 106 | (98.1) | 0.26 | 8 | (7.4) | 100 | (92.6) | 0.75 | |
| 2 partners | 117 | (16.9) | 29 | (25.7) | 84 | (74.3) | 4 | (3.5) | 109 | (96.5) | 5 | (4.3) | 112 | (95.7) | 5 | (4.3) | 112 | (95.7) | |||||
| 3–10 partners | 262 | (37.9) | 52 | (20.4) | 203 | (79.6) | 28 | (11.0) | 227 | (89.0) | 10 | (3.8) | 251 | (96.2) | 16 | (6.1) | 245 | (93.9) | |||||
| More than 10 partners | 201 | (29.1) | 37 | (18.7) | 161 | (81.3) | 26 | (13.1) | 172 | (86.9) | 13 | (6.5) | 187 | (93.5) | 14 | (7.0) | 186 | (93.0) | |||||
| Sexual behaviours over the past 6 months | |||||||||||||||||||||||
| C-IAI with men | Yes | 131 | (18.3) | 18 | (14.2) | 109 | (85.8) | 0.13 | 5 | (3.9) | 122 | (96.1) | <0.05 | 4 | (3.1) | 126 | (96.9) | 0.32 | 8 | (6.2) | 122 | (93.8) | 0.88 |
| No | 587 | (81.7) | 115 | (20.0) | 459 | (80.0) | 62 | (10.8) | 512 | (89.2) | 30 | (5.2) | 552 | (94.8) | 38 | (6.5) | 544 | (93.5) | |||||
| C-RAI sex with men | Yes | 469 | (65.3) | 97 | (21.2) | 360 | (78.8) | <0.05 | 49 | (10.7) | 408 | (89.3) | 0.15 | 23 | (5.0) | 441 | (95.0) | 0.76 | 30 | (6.5) | 434 | (93.5) | 0.99 |
| No | 249 | (34.7) | 36 | (14.8) | 208 | (85.2) | 18 | (7.4) | 226 | (92.6) | 11 | (4.4) | 237 | (95.6) | 16 | (6.5) | 232 | (93.5) | |||||
| Oral sex with men | Yes | 472 | (65.7) | 92 | (19.7) | 374 | (80.3) | 0.46 | 46 | (9.9) | 420 | (90.1) | 0.69 | 25 | (5.3) | 446 | (94.7) | 0.35 | 33 | (7.0) | 438 | (93.0) | 0.41 |
| No | 246 | (34.3) | 41 | (17.5) | 194 | (82.5) | 21 | (8.9) | 214 | (91.1) | 9 | (3.7) | 232 | (96.3) | 13 | (5.4) | 228 | (94.6) | |||||
| Compensated sex | Yes | 394 | (54.9) | 73 | (19.0) | 312 | (81.0) | 0.99 | 47 | (12.2) | 338 | (87.8) | <0.05 | 23 | (5.9) | 369 | (94.1) | 0.13 | 26 | (6.6) | 366 | (93.4) | 0.84 |
| No | 324 | (45.1) | 60 | (19.0) | 256 | (81.0) | 20 | (6.3) | 296 | (93.7) | 11 | (3.4) | 309 | (96.6) | 20 | (6.3) | 300 | (93.7) | |||||
p<0.05 for bold values; p<0.10 for underlined values.
Values between parentheses are percentages in row display except for the following variables: age, age at sexual debut and number of partners.
Bivariate associations between categorical variables tested either using χ2 or Fisher’s exact test according to expected values.
Differences in the distribution of age, age at sexual debut and number of partners between patients with and without each of the infections tested using Wilcoxon’s Rank Sum Test.
This table only includes data about positive cases for each infection under study. However, the statistical comparisons made reflect positive versus negative cases.
*n=691 for this variable.
C-IAI, condomless insertive anal intercourse; C-RAI, condomless receptive anal intercourse; CT+, positive result for Chlamydia trachomatis infection; HS, high school; MSM/TW, men who have sex with men transgender women; NG+, positive result for Neisseria gonorrhoeae.