Table 2.

Comparison of Demographic and Clinical Characteristics at the Initial and Follow-up Visits Between Women Who Remained Virginal Throughout the Study and Those Who Became Sexually Active

	Initial Visit	Follow-up Visit	Initial Visit	Follow-up Visit	P
Months between visits (median, IQR)		12 (8, 12) (Range 4–20)		8 (4, 12) (Range 3–36)	0.39*
Vaginal medication use in last week	0	0	2 (3%)	0	-
STD diagnosis†	0	0	0	0	-
Birth control method					< 0.01‡
None	25 (96%)	22 (85%)	70 (97%)	6 (8%)
Condoms	0	2 (8%)	0	25 (35%)
Withdrawal	0	0	0	2 (3%)
Hormonal	0	0	2 (3%)	38 (53%)
Other	1(4%)	1(4%)	0	1(1%)
Number of new partners					< 0.01‡
0	n/a	26	n/a	0
1		0		63 (88%)
2		0		6 (8%)
3		0		3 (4%)
Days since last vaginal intercourse (median, IQR)	n/a	n/a	n/a	5 (2, 16) (range 1–43)	-
Vaginal					0.08‡
Less	18 (69%)	13 (50%)	36 (50%)	35 (49%)
Normal	5 (19%)	8 (31%)	32 (44%)	30 (41%)
More	1 (4%)	2 (8%)	3 (4%)	6 (8%)
pH (mean + SD)	4.2 ± 0.3	4.1 ± 0.3	4.1 ± 0.2	4.3 ± 1
Any HPV	1 (4%)	0	3 (4%)	11 (15%)	0.03‡

Data are n(%) unless otherwise specified.

IQR, interquartile range, STD, sexually transmitted disease; SD, standard deviation; HPV, human papillomavirus.

^*P value for Mann-Whitney test comparing medians between women who remained virginal and those who became sexually active.

^†This included testing for gonorrhea, Chlamydia, and herpes simplex virus.

^‡P value for chi-square test comparing values at follow-up between women who remained virginal and those who became sexually active.