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

Comparison 6. Immediate insertion: MLCu 250 versus MLCu 375.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Discontinuation due to pregnancy (24 months) 1 549 Risk Ratio (M‐H, Fixed, 95% CI) 0.80 [0.22, 2.96]
2 Discontinuation due to expulsion (24 months) 1 549 Risk Ratio (M‐H, Fixed, 95% CI) 1.76 [0.52, 5.93]