Table 4.

Longitudinal Studies of Contraceptives and Acquisition of Bacterial Vaginosis

Author, Year	Group	RR (95% CI)
Barbone, 1990[ 12 ]	COC Users vs.IUD/tubal ligation	0.84 (0.63 – 1.10)
Riggs, 2007[ 13 ]	COC User	1.04 (0.78 – 1.39)
	DMPA/Implant Yes	1.07 (0.79 – 1.45)
	Tubal ligation Yes	1.43 (1.02 – 2.07)
	Condom Yes	1.02 (0.79 – 1.31)
Rifkin, 2009[ 14 ]	COC User vs No hormones	0.66 (0.39 – 1.10)
	Progestin only OC vs No Hormones	0.42 (0.20 – 0.88)
Madden, 2012[ 15 ]	IUD Users vs COC, ring or patch	1.28 (0.53 – 3.06)
Bradshaw, 2012[ 16 ]	COC User	0.62 (0.70 – .95)
	Inconsistent condom use	1.9 (1.0-3.3)
Baeten, 2001[ 17 ]	COC vs. no contraception	0.8 (0.7-1.0)
	DMPA vs. no contraception	0.7 (0.5-0.8)