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Table 3 Secondary analyses among only the STI clinic population tested for Chlamydia trachomatis between January 2011 and July 2018 including determinants associated with repeat CT infections using patients repeatedly tested CT negative as the reference group

From: The characteristics of patients frequently tested and repeatedly infected with Chlamydia trachomatis in Southwest Limburg, the Netherlands

  All individuals tested for CT Repeatedly tested CT negative Repeat CT infections
% (n) % (n) % (n) OR (95%CI) Adj. OR (95%CI)
Overall % (n) 100 (8007) 100 (1798) 100 (141)   
Maximum number of sex partners
 Unknown 2.9 (232) 91.3 (21) 8.7 (2) 2.19 (0.44–10.81)  
 0–1 25.7 (2059) 95.8 (207) 4.2 (9) 1  
 2–3 42.7 (3415) 92.5 (769) 7.5 (62) 1.85 (0.91–3.79)  
  ≥ 4 28.7 (2301) 92.2 (801) 7.8 (68) 1.95 (0.96–3.98)  
Any urogenital symptoms
 Unknown 4.7 (374) 94.7 (36) 5.3 (2) 1.14 (0.26–4.95) 1.53 (0.28–8.29)
 Yes 53.9 (4315) 91.4 (1174) 8.6 (111) 1.99 (1.30–3.04) 2.17 (1.41–3.35)
 No 41.4 (3318) 95.5 (588) 4.5 (28) 1 1
Any Proctitis
 Unknown 4.7 (374) 94.7 (36) 5.3 (2) 0.73 (0.17–3.08)  
 Yes 8.4 (676) 89.8 (230) 10.2 (113) 1.53 (0.98–2.40)  
 No 86.9 (6957) 93.1 (1532) 6.9 (26) 1  
Any oropharyngeal symptoms
 Unknown 4.7 (374) 94.7 (36) 5.3 (2) 0.70 (0.17–2.93)  
 Yes 10.3 (826) 92.0 (289) 8.0 (25) 1.12 (0.71–1.75)  
 No 85.0 (6807) 92.8 (1473) 7.2 (114) 1  
Any notification for STI
 Unknown 3.5 (282) 95.1 (39) 4.9 (2) 0.98 (0.23–4.13) 1.09 (0.21–5.66)
 Yes 14.0 (1120) 81.5 (268) 18.5 (61) 4.35 (3.04–6.23) 4.55 (3.17–6.54)
 No 82.5 (6605) 95.0 (1491) 5.0 (78) 1 1
Transmission group
 MSW 30.2 (2415) 90.9 (341) 9.1 (34) 1.33 (0.88–2.03)  
 MSM 11.2 (900) 93.5 (360) 6.5 (25) 0.93 (0.59–1.48)  
 Women 58.6 (4692) 93.0 (1097) 7.0 (82) 1  
  1. Statistically significant associations (p < 0.05) are depicted in bold
  2. Abbreviations: CT Chlamydia trachomatis, NG Neisseria gonorrhoeae, HIV Human immunodeficiency virus, STI Sexually transmitted infection, OR Odds ratio, CI Confidence interval, Adj. Adjusted