Table 1.

Background Characteristics	n = 1683
Ethnic group % (95% CI)
Sotho	53.9 (51.6 to 56.3)
Zulu	30.5 (28.4 to 32.8)
Other	15.6 (13.9 to 17.4)
Mean (median, IQR) of age (yrs)	20.7 (21.19–22)
Primary level of education completed	98.5 (97.8 to 99.0)
Married or living as married % (95% CI)*	4.3 (3.3 to 5.6)
Circumcised % (95% CI)	51.3 (48.9 to 53.7)
Reported sexual behavior
Mean (median, IQR) number of lifetime partners	5.2 (4.2–6)
Mean (median, IQR) age (yrs) of last sexual partner	20.0 (20.18–22)
Consistent condom use with nonspousal sex partners % (95% CI)†‡	25.2 (22.4 to 28.2)
Sexually transmitted infections
HPV-positive % (95% CI)	19.1 (17.3 to 21.1)
LR-HPV-positive % (95% CI)	14.0 (12.4 to 15.7)
HR-HPV-positive % (95% CI)	17.3 (15.6 to 19.2)
At least two HR-HPV % (95% CI)	7.0 (5.9 to 8.3)
HSV-2 at recruitment % (95% CI)	3.6 (2.7 to 4.6)
Became HSV-2 positive % (95% CI)	4.2 (3.3 to 5.3)
T. vaginalis§ % (95% CI)	2.2 (1.6 to 3.0)
N. gonorrhoeae§ % (95% CI)	9.8 (8.4 to 11.3)
C. trachomatis§ % (95% CI)	2.8 (2.0 to 3.6)

^*At some time during the past 12 months.

^†During the past 12 months.

^‡Among those having had sexual intercourse during the past 12 months.

^§At the 21-month visit.

IQR, interquartile range.