TABLE 1—

Percentages of and Relative Risks (RRs) for Recurrent Pelvic Inflammatory Disease (PID), Chronic Pelvic Pain, and Infertility After an Episode of PID, by Contraceptive Method Use in the 4 Weeks Prior to Baseline: 1996–1999

	Condition
	Recurrent PID				Chronic Pelvic Pain				Infertility
	n	%	RR	Adjusted RRa (95% CI)	n	%	RR	Adjusted RRa (95% CI)	n	%	RR	Adjusted RRa (95% CI)
Condoms
No	324	16.7		1.0	300	36.7		1.0	132	54.5		1.0
≤ 5–10 times	156	16.0	1.0	0.8 (0.5, 1.5)	142	31.0	0.9	0.8 (0.5, 1.3)	59	45.8	0.8	0.7 (0.4, 1.5)
≤ 6–10 times	204	8.8	0.5	0.5 (0.3, 0.9)	187	26.7	0.7	0.7 (0.5, 1.2)	46	34.8	0.6	0.4 (0.2, 0.9)
Other barrierb
No	650	14.8		1.0	597	32.7		1.0	226	48.7		1.0
Yes	34	2.9	0.2	0.2 (0.02, 1.1)	32	28.1	0.9	0.8 (0.3, 1.7)	11	45.5	0.9	1.2 (0.3, 4.8)
Oral contraceptives
No	606	14.4		1.0	556	33.1		1.0	217	47.0		1.0
Yes	78	12.8	0.9	0.9 (0.4, 1.8)	73	27.4	0.8	0.8 (0.4, 1.4)	20	65.0	1.4	3.2 (1.1, 9.4)
Medroxyprogesterone
No	605	14.5		1.0	556	33.3		1.0	214	50.9		1.0
Yes	79	11.4	0.8	0.6 (0.3, 1.2)	73	26.0	0.8	0.5 (0.3, 0.9)	23	26.1	0.5	0.5 (0.2, 1.4)
No effective methodc
No	453	12.1		1.0	416	26.8		1.0	134	41.8		1.0
Yes	231	18.2	1.5	1.4 (0.5, 3.6)	213	39.9	1.4	1.7 (0.8, 3.6)	103	57.3	1.4	2.3 (0.6, 8.3)

Note. CI = confidence interval.

^aAdjusted for age, number of live births, race, nonmonogamy at baseline, new partner at baseline, gonococcal or chlamydial cervicitis at baseline, education, number of study visits, and all other forms of contraception other than that under consideration.

^bDiaphragms, spermicides, cervical cap, or female condom.

^cNo contraception, natural family planning, or withdrawal.