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Table 2 Primary analyses among the total 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 (17,616) 100 (3794) 100 (244)   
Initial test location
 Mental healthcare 0.7 (124) 100 (29) 0.0 (0) NA NA
 STI clinic 45.5 (8007) 92.7 (1798) 7.3 (141) 1.37 (1.04–1.81) 1.02 (0.76–1.37)
 Hospital 14.2 (2506) 96.6 (425) 3.4 (15) 0.62 (0.35–1.08) 0.61 (0.34–1.10)
 General practitioner 39.6 (6979) 94.6 (1542) 5.4 (88) 1 1
Sex
 Men 36.0 (6350) 93.4 (1265) 6.6 (89) 1.15 (0.88–1.50)  
 Women 64.0 (11,266) 94.2 (2529) 5.8 (155) 1  
Age
  < 25 years 45.4 (7990) 92.2 (1480) 7.8 (126) 1.67 (1.29–2.16) 1.83 (1.38–2.43)
  ≥ 25 years 54.6 (9626) 95.1 (2314) 4.9 (118) 1 1
Urbanization
 Rural 31.6 (5559) 93.3 (1140) 6.7 (82) 1  
 Urban 68.4 (12,051) 94.2 (2652) 5.8 (162) 0.84 (0.65–1.12)  
HIV positive
 Not tested 44.9 (7911) 95.5 (1096) 4.5 (52) 0.69 (0.50–0.95) 0.77 (0.55–1.07)
 Yes 1.4 (246) 85.7 (72) 14.3 (12) 2.43 (1.30–4.56) 2.07 (1.02–4.22)
 No 53.7 (9459) 93.6 (2626) 6.4 (180) 1 1
NG positive
 Not tested 5.6 (984) 97.7 (43) 2.3 (1) 0.41 (0.06–3.00) 0.53 (0.07–3.93)
 Yes 2.0 (344) 77.6 (128) 22.4 (38) 5.25 (3.56–7.74) 5.04 (3.33–7.63)
 No 92.5 (16,288) 94.6 (3623) 5.4 (205) 1 1
  1. Statistically significant (p < 0.05) associations 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