Table 2.
Study | Method (number of participants) | Cycles with an intended bleeding pattern (%) | p value |
---|---|---|---|
Dieben et al 2002 | NuvaRing (n = 2322) | 63.0 | |
Oddsson et al 2005b (13 cycles) | NuvaRing (n = 512) | 58.8–72.8 | <0.005 |
150LNG/30EE COC (n = 518) | 43.4–57.9 | for all cycles | |
Milsom et al 2006 (13 cycles) | NuvaRing (n = 499) | 55.2–68.5 | <0.01 |
DRSP/30EE COC (n = 484) | 35.6–56.6 | for all cycles |
Abbreviations: COCs, combined oral contraceptives; DRSP, drospirenone; EE, ethinyl estradiol.