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Table 2 Associations between variables and Chlamydia trachomatis infection in women, heterosexual men and MSM

From: Prevalence of Chlamydia trachomatis infection in women, heterosexual men and MSM visiting HIV counselling institutions in North Rhine-Westphalia, Germany - should Chlamydia testing be scaled up?

Variables Crude prevalence of Chlamydia infection % (n/N) Unadjusted PR (95 % CI) P value Adjusted PR (95 % CI)
Women (N = 1144) Number of participants in the final model: N = 839
Age group (years)
  ≥ 40 (ref.) 2.5 (5/202) Ref.    Ref.  
 18–24 9.0 (25/279) 3.6 (1.4–9.3) 0.007 3.0 (1.2–7.8)
 25–29 6.8 (22/345) 2.6 (1.0–6.7) 0.052 1.9 (0.7–4.8)
 30–39 2.8 (9/318) 1.1 (0.4–3.4) 0.808 1.0 (0.3–2.9)
No. of partners
 1 (ref.) 4.4 (19/428) Ref.    Ref.  
 0 0 (0/53) -    -  
 2 6.7 (16/238) 1.5 (0.8–2.9) 0.208 1.4 (0.8–2.7)
  ≥ 3 9.3 (17/183) 2.1 (1.1–3.9) 0.022 2.1 (1.1–4.0)
Country of birth (ref. = Germany) 5.0 (47/938) Ref.     
 Abroad 7.5 (14/186) 1.5 (0.8–2.7) 0.166 1.9 (1.0–3.5)
Vaginal discharge (ref. = no) 4.9 (52/1073) Ref.     
 Yes 12.7 (9/71) 2.6 (1.3–5.1) 0.005 - -
Reason for getting tested
 (ref. = not a reason for getting tested) 4.2 (17/404) Ref.     
 Intercourse with a person of unknown HIV status 6.2 (43/697) 1.5 (0.9–.2.6) 0.126 - -
 (ref. = not a reason for getting tested) 5.3 (57/1076) Ref.     
 Occupational exposure 12 (3/25) 2.3 (0.8–6.9) 0.131 - -
Heterosexual men (N = 1134) Number of participants in the final model: N = 854
Age group (years)
  ≥ 40 (ref.) 1.8 (5/274) Ref.    Ref.  
 18–24 5.7 (12/210) 3.1 (1.1–8.8) 0.029 4.1 (1.3–13)
 25–29 4.2 (12/288) 2.3 (0.8–6.4) 0.116 2.0 (0.6–6.7)
 30–39 1.9 (7/362) 1.1 (0.3–3.3) 0.920 1.2 (0.3–4.2)
No. of partners
 1 (ref.) 3.4 (10/297) Ref.    Ref.  
 0 0.0 (0/20) -    -  
 2 3.5 (9/255) 1.0 (0.4–2.5) 0.917 1.1 (0.4–2.7)
  ≥ 3 3.4 (11/321) 1.0 (0.4–2.4) 0.967 0.9 (0.4–2.2)
Reason for getting tested
 (ref. = not a reason for getting tested) 2.3 (10/437) Ref.    Ref.  
 Intercourse with a person of unknown HIV status 3.6 (24/668) 1.6 (0.8–3.3) 0.224 1.7 (0.7–3.9)
MSM (N = 549) Number of participants in the final model: N = 358
Age group (years)
  ≥ 40 (ref.) 2.7 (4/150) Ref.    Ref.  
 18–24 3.7 (4/108) 1.4 (0.4–5.4) 0.637 1.7 (0.4–6.6)
 25–29 2.8 (3/109) 1.0 (0.2–4.5) 0.967 0.4 (0.04–3.4)
 30–39 4.4 (8/182) 1.6 (0.5–5.3) 0.412 1.3 (0.4–4.3)
No. of partners
 1 (ref.) 2.0 (2/101) Ref.    Ref.  
 0 0.0 (0/4) -    -  
 2 0.0 (0/69) -    -  
  ≥ 3 5.1 (15/431) 2.6 (0.6–11) 0.211 2.8 (0.6–12)
Penile discharge (ref. = no) 3.3 (18/546) Ref.     
 Yes 33.3 (1/3) 10.1 (1.9–53) 0.006 - -
Painful urination (ref. = no) 3.2 (17/534) Ref.     
 Yes 13.3 (2/15) 4.2 (1.1–17) 0.041 - -