Table 3.

Contraception History by Severity of Diagnosis

	CIN 3/AIS* (n=370)	Invasive Cancer (n=163)	p-value
Ever Used Birth Control	361 (98%)	145 (89%)	<0.001
Median Number of Types of Birth Control Used (Interquartile Range)	3 (2-3)	2 (1-3)	<0.001
Birth Control Method Used **
Diaphragm	8 (2%)	7 (4%)	0.25
IUD	20 (5%)	21 (13%)	0.003
Sponge	4 (1%)	5 (3%)	0.14
Spermicide	52 (14%)	13 (8%)	0.048
Injectable Medication	156 (42%)	11 (7%)	<0.001
Patch	30 (8%)	1 (<1%)	0.007
Pill	317 (86%)	113 (69%)	<0.001
Tubal	76 (21%)	67 (41%)	<0.001
Male Sterilization	26 (7%)	18 (11%)	0.12
Norplant	2 (<1%)	1 (<1%)	>0.9
Condom	281 (76%)	70 (43%)	<0.001
No Birth Control	9 (2%)	18 (11%)	<0.001

^*CIN = cervical intraepithelial neoplasia, AIS = adenocarcinoma in situ

^**Subjects may report more than one method of birth control.