title: Efficacy and safety of a contraceptive vaginal ring (NuvaRing) compared with a combined oral contraceptive: a 1-year randomized trial.
abstract: This open-label, randomized, Phase III study compared the efficacy and tolerability of and compliance with NuvaRing, a combined contraceptive vaginal ring releasing 15 microg of ethinylestradiol (EE) and 120 microg of etonogestrel daily, with those of and with a combined oral contraceptive (COC) containing 150 microg of levonorgestrel (LNG) and 30 microg of EE. Subjects received NuvaRing or a COC for 13 cycles (3 weeks of ring/pill treatment followed by a 1-week ring-/pill-free period). A total of 1030 subjects (NuvaRing, n=512; COC, n=518) was randomized and started treatment (intent-to-treat [ITT] population). The percentage of women in the ITT population who completed the trial was 70.9% for the NuvaRing group and 71.2% for the COC group. Five in-treatment pregnancies occurred in each group, giving Pearl indices of 1.23 for NuvaRing and 1.19 for the COC. Compliance with both treatments was excellent and both were well tolerated. In conclusion, NuvaRing has comparable efficacy and tolerability with a COC containing 150 microg of LNG and 30 microg of EE and does not require daily dosing.
authors.affiliation: Idungården Legesenter, Olav Tryggvasonsgate 24c, NO-7011 Norway.
authors.forename: Kristjan
authors.initials: K
authors.lastname: Oddsson
authors.forename: Beate
authors.initials: B
authors.lastname: Leifels-Fischer
authors.forename: Nilson Roberto
authors.initials: NR
authors.lastname: de Melo
authors.forename: Dominique
authors.initials: D
authors.lastname: Wiel-Masson
authors.forename: Chiara
authors.initials: C
authors.lastname: Benedetto
authors.forename: Carole H J
authors.initials: CH
authors.lastname: Verhoeven
authors.forename: Thom O M
authors.initials: TO
authors.lastname: Dieben
mesh_terms: D000328:Adult; D003267:Contraception / Q000379:methods*; D003274:Contraceptive Devices, Female / Q000009:adverse effects / Q000592:standards*; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage* / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D005060:Europe; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D007973:Leukorrhea / Q000209:etiology; D013019:South Africa; D013997:Time Factors; D016896:Treatment Outcome; D014627:Vaginitis / Q000209:etiology
chemical_list: D003277:Contraceptives, Oral, Combined