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Table 2 Demographic and sexual risk behavior characteristics of women and MSM with anorectal infections by Chlamydia trachomatis MLST cluster

From: No indication for tissue tropism in urogenital and anorectal Chlamydia trachomatis infections using high-resolution multilocus sequence typing

Variable Cluster I Cluster II Cluster III Cluster IV Cluster V Cluster VI Residual P I-III+R P IV-VI P IV+V P total
  n = 79 n = 56 n = 19 n = 93 n = 56 n = 40 n = 49
ompA Genovar                - - - -
  B 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 1 (2.0%)     
  D 0 (0.0%) 9 (16.1%) 1 (5.3%) 0 (0.0%) 56 (100.0%) 0 (0.0%) 12 (24.5%)     
  E 79 (100.0%) 4 (7.1%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 8 (16.3%)     
  F 0 (0.0%) 43 (76.8%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 2 (4.1%)     
  G 0 (0.0%) 0 (0.0%) 0 (0.0%) 64 (68.8%) 0 (0.0%) 0 (0.0%) 10 (20.4%)     
  H 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 4 (8.2%)     
  I 0 (0.0%) 0 (0.0%) 15 (78.9%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 3 (6.1%)     
  J 0 (0.0%) 0 (0.0%) 3 (15.8%) 29 (31.2%) 0 (0.0%) 0 (0.0%) 6 (12.2%)     
  K 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 3 (6.1%)     
  L2 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 3 (7.5%) 0 (0.0%)     
  L2b 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 37 (92.5%) 0 (0.0%)     
Demographics                   
Gender                0.095 0.207 0.175 <0.001
  Male 5 (6.3%) 9 (16.1%) 0 (0.0%) 90 (96.8%) 56 (100.0%) 40 (100.0%) 7 (14.3%)     
  Female 74 (93.7%) 47 (83.9%) 19 (100.0%) 3 (3.2%) 0 (0.0%) 0 (0.0%) 42 (85.7%)     
Age in years (continuous)a                0.438 0.112 0.089 <0.001
  Median (IQR) 23 (21–27) 23 (20–28) 22 (21–24) 37 (29–45) 38 (29–45) 43 (35–46) 25 (20–29)     
Age in years (categorical)a                0.656 0.359 0.951 <0.001
  <15 0 (0.0%) 1 (1.8%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)     
  15-19 10 (12.7%) 7 (12.7%) 3 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%) 5 (10.2%)     
  20-24 40 (50.6%) 25 (45.5%) 12 (0.0%) 6 (6.9%) 5 (9.1%) 0 (0.0%) 19 (38.8%)     
  25-29 14 (17.7%) 13 (23.6%) 2 (0.0%) 16 (18.4%) 9 (16.4%) 3 (7.7%) 15 (30.6%)     
  30-39 12 (15.2%) 6 (10.9%) 1 (0.0%) 27 (31.0%) 18 (32.7%) 15 (38.5%) 5 (10.2%)     
  ≥40 3 (3.8%) 3 (5.5%) 1 (0.0%) 38 (43.7%) 23 (41.8%) 21 (53.8%) 5 (10.2%)     
Sexual behavior                   
Number of partners in preceding 6 months (continuous)b                0.396 0.014 0.463 <0.001
  Median (IQR) 3 (2–6) 3 (2–6) 2 (1–3) 5 (3–20) 5 (3–10) 10 (10–20) 3 (1–6)     
Receptive anal intercoursec                0.863 0.056 0.524 <0.001
  None 9 (16.7%) 4 (13.0%) 1 (10.5%) 2 (2.3%) 0 (0.0%) 0 (0.0%) 7 (14.3%)     
  Safe 7 (9.0%) 7 (13.0%) 2 (10.5%) 27 (31.0%) 17 (30.9%) 4 (10.3%) 6 (12.2%)     
  Unsafed 62 (74.4%) 43 (74.1%) 16 (78.9%) 58 (66.7%) 38 (69.1%) 35 (89.7%) 36 (73.5%)     
Notified of STI by a sexual partnera                0.301 0.740 0.750 0.556
  No 69 (87.3%) 41 (74.5%) 15 (78.9%) 66 (75.9%) 43 (78.2%) 32 (82.1%) 40 (81.6%)     
  Yes 10 (12.7%) 14 (25.5%) 4 (21.1%) 21 (24.1%) 12 (21.8%) 7 (17.9%) 9 (18.4%)     
STI related symptomsa                0.778 0.007 0.548 0.014
  No 55 (69.6%) 34 (61.8%) 13 (68.4%) 55 (63.2%) 32 (58.2%) 13 (33.3%) 31 (63.3%)     
  Yes 24 (30.4%) 21 (38.2%) 6 (31.6%) 32 (36.8%) 23 (41.8%) 26 (66.7%) 18 (36.7%)     
HIV status                0.627 <0.001 0.556 <0.001
  Unknown 0 (0.0%) 2 (3.6%) 1 (5.3%) 9 (9.7%) 3 (5.4%) 3 (7.5%) 1 (2.0%)     
  Negative 75 (94.9%) 52 (92.9%) 18 (94.7%) 53 (57.0%) 31 (55.4%) 3 (7.5%) 46 (93.9%)     
  Positive 4 (5.1%) 2 (3.6%) 0 (0.0%) 31 (33.3%) 22 (39.3%) 34 (85.0%) 2 (4.1%)     
Received money for sex in preceding 6 monthsa                0.822 0.581 0.425 <0.001
  No 65 (82.3%) 50 (90.9%) 17 (89.5%) 86 (98.9%) 55 (100.0%) 39 (100.0%) 42 (85.7%)     
  Yes 5 (6.3%) 5 (9.1%) 2 (10.5%) 1 (1.1%) 0 (0.0%) 0 (0.0%) 7 (14.3%)     
  1. Abbreviations: MSM men who have sex with men, STI sexual transmitted infection, HIV human immunodeficiency virus, IQR interquartile range, P P-value.
  2. Ptotal represents the p-value for the analysis over all clusters and the residual group; PI-III+R over clusters I to III and the residual group consisting predominantly of women; PIV-VI over clusters VI tot VI consisting predominantly of MSM including the LGV cluster. PIV-V over clusters IV and V consisting predominantly of MSM excluding the LGV cluster.
  3. Significant P-values in bold.
  4. aData is missing for 1 cluster II infection, 6 cluster IV infections, 1 cluster V infection, and 1 cluster VI infection.
  5. bData is missing for 3 cluster I infections, 4 cluster II infections, 45 cluster IV infections, 16 cluster VI infections, and 4 residual infections.
  6. cData is missing for 1 cluster I infection, 2 cluster II infections, 6 cluster IV infections 1 cluster V infection, and 1 cluster VI infection.
  7. dEight women reported receptive anal intercourse but condom use was unknown. These were all included as having unsafe receptive anal intercourse, as this would be the most likely explanation for infection.