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Table 3 Prevalence and multivariate associations of Chlamydia infection with demographic, behavioural, and clinical factors for female higher education students†

From: Chlamydia trachomatis infection and sexual behaviour among female students attending higher education in the Republic of Ireland

     Model 1 Model 2
  Total N (%) Chlamydia positive   OR 95% CI OR 95% CI
Higher Education Institution
   A 114 4 (3.5)   ref   ref  
   B 180 13 (7.2)   2.4 0.8-8.0 2.1 0.6-7.3
   C 156 5 (3.2)   1.0 0.3-4.0 1.1 0.3-4.5
Number of lifetime sexual partners
   1 125 3 (2.4) 1-2 ref    
   2 79 1 (1.3)      
   3 54 5 (9.3) ≥ 3 3.6 1.4-9.5*   
   ≥ 4 187 13 (7.0)      
SI with a new partner and no condom used
   No 263 8 (3.0)      
   Yes 180 14 (7.8)      
Number of one-night stands
0-1 324 12 (3.7)     ref  
≥ 2 125 10 (8.0)     2.7 1.0-7.7*
Number of sexually active years
≤ 1 35 0 (0.0) per year 0.8 $ 0.7-1.1 0.9$ 0.8-1.2
1-2 79 3 (3.8)      
2-3 91 4 (4.4)      
3-4 91 9 (9.9)      
4-5 64 4 (6.3)      
≥ 5 90 2 (2.2)      
Have suggestive symptoms
   No 341 12 (3.5)   ref   ref  
   Yes 109 10 (9.2)   2.5 1.0-6.3* 2.5 1.0-6.9*
  1. † Model 1 allows for international comparison. Model 2 assists identification of high-risk students for screening purposes.
  2. ref: reference category
  3. * p value significant
  4. $ for every year increase