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Table 4 Results cross design synthesis, continuation rates (%) by parity

From: Cross design analysis of randomized and observational data – application to continuation rates for a contraceptive intra uterine device containing Levonorgestrel in adolescents and adults

Parity Continuation rate year 1 (in %) Continuation rate year 1 (95%-Confidence Interval) Continuation rate year 2 (in %) Continuation rate year 2 (95%-Confidence Interval)
Parous 90.38 90.07; 90.69 81.39 80.98; 81.80
Nulliparous 73.02 72.20; 73.85 68.15 67.29; 69.01
Combined 86.83 86.57; 87.09 78.52 78.21; 78.84