Table 2. Incidence rates of C. trachomatis and N. gonorrhoeae among young women in Cape Town, South Africa, October 2012-February 2014.

Infection	N at risk	Incident events	py	IR per 100 py	95%CI
C. trachomatis	322	48	113.3	42.4	31.9–56.2
N. gonorrhoeae	347	29	139.3	20.8	14.5–29.9
C. trachomatis and/or N. gonorrhoeae	356	70	148.8	47.0	37.2–59.5

Abbreviations: CI, confidence interval; IR, incidence rate; py, person-years.