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. 2014 Jul 28;2014(7):CD001777. doi: 10.1002/14651858.CD001777.pub4

Comparison 9. Immediate insertion: Lippes Loop (plain) versus Lippes Loop with copper.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Discontinuations due to pregnancy (10 years) 1 400 Risk Ratio (M‐H, Fixed, 95% CI) 3.4 [1.28, 9.04]
2 Discontinuations due to expulsion (10 years) 1 400 Odds Ratio (M‐H, Fixed, 95% CI) 3.35 [1.59, 7.06]