Study	Reason for exclusion
Anderson 2006	Not a randomized controlled trial. Large single arm prospective trial (n = 1006)
Archer 2006	Not a randomized controlled trial. Large single arm prospective trial (n = 2134)
Aubeny 2004	Not a randomized controlled trial
Barreiros 2007	Not a randomized controlled trial. Continuous dosing (84 days) of vaginal ring to monitor vaginal bleeding.
Barreiros 2010	Not a randomized controlled trial
Barreiros 2011	Not a randomized controlled trial
Birtch 2006	Randomized study of continuous vs. cyclic dosing of OCs to compare differences in follicular development during the hormone‐free interval and following discontinuation. Not a study of continuous COCs for contraception.
Bonassi Machado 2004	Not a randomized controlled trial
Bonassi Machado 2005	Not a randomized controlled trial
Cachrimanidou 1994	Randomized study looking at the differences in hemostasis and lipid metabolism between continuous vs. cyclic dosing of COCs. Not a study of continuous COCs for contraception.
Cheewadhanaraks 2012	Randomized study of DMPA versus continuous OC for endometriosis.
Davis 2008	Not a randomized controlled trial
de Voogd 1991	Not a randomized controlled trial
Dmitrovic 2012	Randomized study evaluating treatment of primary dysmenorrhea
Edelman 2006	Not a study of continuous COCs for contraception. 4 Continuous arms, no cyclic arm
Fiodart 2006	Not a randomized controlled trial
Fraser 2005	Not a continuous dosing trial. No cyclic arm
Hamerlynck 1987	Not a randomized controlled trial
Johnson 2007	Not a randomized controlled trial
Kaneshiro 2012	Not comparing cyclic versus continuous OCs
Kornatt 1992	Not a randomized controlled trial
Kovacs 1994	Not a randomized controlled trial
Kroll 2010	Not a randomized controlled trial. Single treatment, open‐label study.
Loudan 1977	Not a randomized controlled trial
Machado 2010	Randomized study looking at differences in metabolic and coagulation factors
Rad 2011	Not a continuous dosing trial for contraceptive purposes
Ruchhoft 1996	Randomized study of continuous vs. cyclic dosing of COCs for treatment of polycystic ovarian disease. Not a study of continuous COCs for contraception.
Sanger 2008	Randomized study looking at differences in thyroid and androgen parameters between continuous and cyclic dosing of COCs (30 mcg EE/2mg dienogest). Not a study of continuous COCs for contraception
Schlaff 2004	Not a continuous dosing trial for contraceptive purposes
Seidman 2010	Not a randomized controlled trial
Seracchioli 2010	Randomized study evaluating recurrence of endometriomas
Shulman 2005	Not a randomized controlled trial
Sillem 2003	Not a randomized controlled trial
Steinkampf 2001	Randomized study of continuous vs. cyclic dosing of COCs for menstrual suppression and contraception. The majority of the outcome measures for this review could not be obtained from the publication or from the authors.
Sulak 1997	Not a randomized controlled trial
Sulak 2004	Not a randomized controlled trial.
Sulak 2008	Randomized study of continuous vaginal ring for comparison of breakthrough bleeding. No cyclic arm
Vandever 2008	Randomized study of continuous dosing (1 arm with a hormone‐free interval, 1 arm with 7 days of EE) versus cyclic dosing to evaluate differences in pituitary‐ovarian axis suppression. Not a study of COCs for contraception.
Vercellini 2002	Randomized study of continuous dosing of COCs vs. cyproterone for treatment of endometriosis. Not a study of continuous COCs for contraception.
Vercellini 2003	Not a randomized controlled trial