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Table 2 Confidence intervals comparing age groups of patients and a positive chlamydia test

From: Prevalence of genital chlamydia infection in urban women of reproductive age, Nairobi, Kenya

Age Number of participants (n=300) Chlamydia test positive (n=18) Frequency and confidence intervals (%)
  Site one Site two Total Site one Site two Total  
<20 years 4 2 6 0 0 0 0 (0–0)
20-25 years 21 27 48 0 0 0 0 (0–0)
25-30 years 39 38 77 4 2 6 33.3 (22.2 – 44.4)
30-35 years 40 39 79 2 0 2 11.1 (3.7 – 18.5)
35-40 years 26 21 47 3 2 5 27.8 (17.2 – 38.3)
40-45 years 20 23 43 4 1 5 27.8 (17.2 – 38.3)