Table 1.

Selected Baseline Characteristics of the Precancer Cases and Controls^* from the WIHS Study

	Precancer Cases (n = 72)	Controls (n = 72) *	p value
Age, median (IQR)	38.4 (34.0–45.4)	36.6 (32.5–42.0)	0.08
Race, n (%)			0.98
Black	44 (61)	45 (63)
Hispanic	21 (29)	20 (28)
White	7 (10)	7 (10)
Other	0 (0)	0 (0)
Risk factors
Lifetime number of sex partners, median (IQR)	10 (5–50)	20 (6–100)	0.16
Number of sex partners past 6 months, median (IQR)	1 (0–1)	1 (0–1)	0.09
Parity, median (IQR)	3 (1–4)	2 (1–3)	0.03
Current Smoking, n (%)	48 (67)	39 (54)	0.13
Hierarchical HPV genotype, n (%)**			1.00
HPV16	19 (26)	19 (26)
HPV18	11 (15)	11 (15)
Other high risk (HR) HPV (no HPV16 or 18)	42 (58)	42 (58)
Multiple HR-HPV Types, n (%)***	23 (32)	9 (13%)	0.01
CD4 count, median (IQR)	237 (133–456)	278 (149–454)	0.71

^*Controls had no CIN2 or greater at any time in the WIHS Study, and were matched to cases based on age, CD4 count, and HPV.

^**HPV16 > HPV18 > other HPV types. Approximately 32% (23/72) of cases and 13% (9/72) had multiple HR-HPV infections (i.e., ≥ 2 HR-HPV types).

^***Details of cases and controls with multiple HR-HPV types are shown in Figure 3.