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. 2014 Jan 29;2014(1):CD003987. doi: 10.1002/14651858.CD003987.pub5

Knopp 2001.

Methods Study location not described.
 Nine treatment cycles.
Participants Healthy women age 21 to 35 years with normal lipid levels and regular menses.
 Excluded diseases affecting lipoprotein metabolism; recent OC, injectable hormones or certain drug use; certain diseases; high blood pressure; recent smoking; recent alcohol or drug abuse; pregnancy; lactation.
Interventions Desogestrel 50‐100‐150 µg and EE 35‐30‐30 µg (N=33) versus levonorgestrel 50‐75‐125 µg and EE 30‐40‐30 µg (N=34).
Outcomes Plasma lipids, glucose, insulin, hemostasis, sex hormone binding globulin.
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk No information
Allocation concealment (selection bias) Unclear risk No information
Blinding (performance bias and detection bias) 
 All outcomes Unclear risk No information
Incomplete outcome data (attrition bias) 
 All outcomes Unclear risk Early discontinuation and loss to follow up not reported.
 One woman from desogestrel group excluded for protocol violation before starting treatment.