TABLE 3.

Cytokine expression in subjects who have previously cleared an HPV infection^a

Subject	Months since the last positive HPV test	Result of test forb:
		IFN-γ	IL-4	TNF	IL-12
h	4	+	+	+	+
i	4	+	−	+	+
j	4	+	+	+	+
k	4	−	−	+	−
l	8	+	−	+	+
m	8	+	+	+	−
n	9	−	NDc	+	−
o	10	+	ND	+	−
p	12	−	+	+	−
q	17	+	+	−	−
r	17	−	+	+	+
s	21	+	−	+	+
t	22	+	+	+	−
u	39	+	+	+	+
v	75	−	+	+	−

^aAll subjects shown in the table had a history of HPV infection and clearance and were HPV negative at the time of the cytokine assay. In cases where cytokine data was available for more than one HPV-negative visit by a subject, only the first visit with cytokine data was included in this cross-sectional analysis. 

^bOverall, 23% of these subjects had the Th1 cytokine pattern, defined as the expression of IFN-γ and absence of IL-4 by RT-PCR. Due to incomplete data, subjects n and o were not included in determining the percentage of subjects with Th1 pattern. Percentages of subjects expressing IFN-γ, IL-4, TNF, and IL-12 were 67, 69, 93, and 47%, respectively. 

^cND, not determined.